2026-04-13T16:55:51Z https://yabu.me Mark Dominus https://yabu.me/npub1zfyhk2vwxl5cm5xjzyp409jd58fjs9jxzzhefdc0xlywtypna6ksgx8xdp https://media.mathstodon.xyz/accounts/avatars/000/003/405/original/c787f9d3377fb961.png https://media.mathstodon.xyz/accounts/avatars/000/003/405/original/c787f9d3377fb961.png https://yabu.me/nevent1qqsxlx44kph3fe5dxd7y60e0uv2qkfss3sj6qszm845awsyzk5deruszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26wwgmen #dodecahedron #dodecahedronDimanche<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/512/055/025/471/253/original/d9f03b744a6de2bc.jpeg"> <br/> 2026-05-03T18:30:28Z https://yabu.me/nevent1qqsyuguudhvyh9232scy6ttttpnak7grvsc0w9dlp2kv39jlykd78egzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h264pty8j A COMPUTER CANNOT FIND OUT<br/><br/>THEREFORE A COMPUTER MUST NEVER BE ALLOWED TO FUCK AROUND 2026-05-01T12:24:30Z https://yabu.me/nevent1qqs937wkxkfj7r75xed820gp0n3x7caqc3334658v9h3s5d9ecc823czyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h263wut2k Looking for a beautiful and elegant background wallpaper for your phone or monitor? Try image search for “amniotic ferning”.<br/><br/> <img src="https://commons.wikimedia.org/wiki/File:Positive_fern_test.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/497/259/325/647/207/original/66007d1e9f9302b8.jpg"> <br/> 2026-05-01T03:46:17Z https://yabu.me/nevent1qqsrv7ep6hwnksd27pw5khlrf3ug3dmn804fgrmeancv35zqx4rjnwqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26e3zflk In reply to <a href='/nevent1qqsrxe5374gp0yf07h7wt2x5fz2lcskzyhpl473l44qzlhcf4unpcys79238g'>nevent1q…238g</a><br/>_________________________<br/><br/>My kid pointed out that our holly tree has eyes, and now I can&#39;t unsee it.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/483/290/439/581/853/original/5266789c98338f7a.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/483/290/448/507/334/original/d0ad8a7cb37c08d5.jpg"> <br/> 2026-04-28T16:32:53Z https://yabu.me/nevent1qqsw3aqn0p7lu0c50q2c49mqfq99u6us3ffwkh6y69xjp5yqz2ppk3czyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h2670uwre In reply to <a href='/nevent1qqsth4pz8pfaaxf58t937z8zlrd3yaeceptf7twjtfvr4yve9kwyrlsgvx9cd'>nevent1q…x9cd</a><br/>_________________________<br/><br/>It works okay if the addition is all at the end! But if not, all those nice multiplications were completely wasted! 2026-04-27T08:38:36Z https://yabu.me/nevent1qqsxsekh3qwnjarkv3yv9s4p3udynvlndxr93zqe39l6k0mh40h2c3qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ytukje In reply to <a href='/nevent1qqsp85x99ups5400ny2uc6y3yspkgx9y795lepk3umz2quqkne823vsv2y7hk'>nevent1q…y7hk</a><br/>_________________________<br/><br/>An interesting contrast with the representation of integers as lists of the exponents of their prime factors, where ×, gcd, lcm, and = are fast and easy, ≤ is doable, but it&#39;s of very limited use because + is impossible. 2026-04-27T08:31:50Z https://yabu.me/nevent1qqsp85x99ups5400ny2uc6y3yspkgx9y795lepk3umz2quqkne823vszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26v974ck In reply to <a href='/nevent1qqsp5kwaywk7nhvp0w8e6w3sasg3l7cscteayql033lzul0le7eqljghduyk0'>nevent1q…uyk0</a><br/>_________________________<br/><br/>This reminds me of the observation that there&#39;s a representation of numeric quantities that can perform both addition and multiplication of numbers in constant time, but it&#39;s useless for numeric calculation because there&#39;s no corresponding algorithm for the ≤ relation.<br/><br/>(The representation being expression trees with numbers at the leaves.) 2026-04-27T08:27:04Z https://yabu.me/nevent1qqs84zm7fd9akqs2s3h7qc5ytpyqavzz90pvy3r7dezap72nn6n8dmqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26dzzsaj “In 2023, Raytheon’s president stood at the Paris Air Show and described what it took to restart Stinger missile production. They brought back engineers in their 70s to teach younger workers how to build a missile from paper schematics drawn during the Carter administration.”<br/><br/>“The Pentagon hadn’t bought a new Stinger in twenty years. Then Russia invaded Ukraine, and suddenly everyone needed them. [But] the production line was shut down.”<br/><br/>“The software industry is in year three of the same optimization.”<br/><br/><a href="https://techtrenches.dev/p/the-west-forgot-how-to-make-things">https://techtrenches.dev/p/the-west-forgot-how-to-make-things</a> 2026-04-26T12:39:17Z https://yabu.me/nevent1qqsqayazmq25tuelehyvqqcwr080h65y7gl75nkedtmqr7gvp495dmszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26uqudcf View from my porch this week 🌸 <br/><br/>#bloomScrolling #westPhiladelphia<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/392/207/903/543/493/original/6de2c2f1ef72a070.jpg"> <br/> 2026-04-12T14:31:01Z https://yabu.me/nevent1qqs9g282ccq0qtv4h08hrfr5ryry68m8slkalzhh7kazpdhd0l3xhmqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26sxadsn In reply to <a href='/nevent1qqs8xtwd0qtlmyvm0tegxv85rkkm5x0ku5ndxdpycswutn3ngvmmvlcj4gtyq'>nevent1q…gtyq</a><br/>_________________________<br/><br/>Then in 2011 those trolls the Dutch built seven bridges in one town that were all designed to look exactly like the imaginary banknote bridges. They even painted the bridges the same colors as the banknotes.<br/><br/>So now the EU banknotes depict the bridges of Spijkenisse, South Holland. (pop. 72,500)<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/358/321/339/806/879/original/c792901b4504f320.png"> <br/> 2026-04-06T14:53:26Z https://yabu.me/nevent1qqs8xtwd0qtlmyvm0tegxv85rkkm5x0ku5ndxdpycswutn3ngvmmvlczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26a2lq9n In 1996, tired of squabbling between EU countries about whose favorite person or building should be on the EU banknotes, the currency commission held a competition for a new design: “The ground rules for the design strictly prohibited displaying any recognizable national monuments or heroes that risked giving greater prominence to one country over another.” The winning design was a series of bridges that were stylistically typical of different kinds of European bridges, but which weren&#39;t any specific bridges. For example:<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/358/748/571/598/082/original/eb08f2d62981dcfe.png"> <br/> 2026-04-06T14:50:26Z https://yabu.me/nevent1qqspup6966lprs3v6sx6zesuvvaxshkxreuj88jlpcywvrmdc44676szyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26636ypv RE: <a href="https://mastodon.mit.edu/@jefftk/116347588152920252">https://mastodon.mit.edu/@jefftk/116347588152920252</a><br/><br/>#shareGoodNewsToo<blockquote class="border-l-05rem border-l-strongpink border-solid"><div class="-ml-4 bg-gradient-to-r from-gray-100 dark:from-zinc-800 to-transparent mr-0 mt-0 mb-4 pl-4 pr-2 py-2">quoting <br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Article"><a itemprop="url" href="/note19ayvvtp3l7nuawsauqd85uwgv3cu0v6xu5zs4kg79gsxtvrk8duqgq8g50" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1">note19ay…8g50</a></span><br/> </div> The way egg whites can be beaten into a foam and set with heat is hard to replace when cooking for vegans, but you can now by precision fermented egg white protein and it works great! <a href="https://www.jefftk.com/p/chicken-free-egg-whites">https://www.jefftk.com/p/chicken-free-egg-whites</a> </blockquote> 2026-04-06T01:20:24Z https://yabu.me/nevent1qqsgg3mh6s43ueu28829plwzzskjs83vl7ffd5nkuwa2lj59nty4vyszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26zemstq In reply to <a href='/nevent1qqsz2wzlftark67cmn94khx8ks7v90uhf0d3sp778x26rgrw34g74rsgkvlwm'>nevent1q…vlwm</a><br/>_________________________<br/><br/>I love the piece, but that die on the right side of the page is really bothering me. On dice, ⚀ and ⚅ are always on opposite sides, with only the very rarest exceptions.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/318/734/558/871/093/original/64f6e4e7e50b40ac.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/318/734/569/360/017/original/3eabe2f7909502ca.jpg"> <br/> 2026-03-30T15:05:27Z https://yabu.me/nevent1qqs2ufpzkm8guapa956s0v7e5zehzcjt2udk5zhemljjstye2a59adqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26zm4jew It&#39;s 1986. You&#39;ve built a limited but working time machine. Every week, it materializes a small slip of paper with a news headline from 2026.<br/><br/>You arrange a meeting with a millionaire who might be able to help you exploit your source of future information. She looks skeptical, but you ask her to be patient while you warm up the machine. Presently, a bit of paper materializes from nowhere. The millionaire is impressed.<br/><br/>You hand her the slip, wondering what wisdom it will impart. The outcome of a major sporting event? An election result? The name of a successful company that doesn&#39;t yet exist?<br/><br/>But the millionaire&#39;s expression changes to a scowl. She lets the slip flutter to the floor as she leaves your apartment without another word.<br/><br/>You retrieve the slip and read the headline that your machine has produced.<br/><br/><a href="https://www.nytimes.com/athletic/7142152/2026/03/23/cornhole-player-amputee-arrested-murder-dayton-webber/">https://www.nytimes.com/athletic/7142152/2026/03/23/cornhole-player-amputee-arrested-murder-dayton-webber/</a> 2026-03-24T10:52:31Z https://yabu.me/nevent1qqsqznuq4rahp0s5a8pga8v3xfqgv0fm5dt3ftv7awh05tt2eu5duxczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h262wel74 A woman sues her insurance company for terminating her disability benefits. They reach a settlement and agree that the suit will be dismissed with prejudice.<br/><br/>She decides she doesn&#39;t like the settlement and asks her lawyers to reopen the case.They say they can&#39;t: it was dismissed, and in the settlement she agreed not to reopen the case.<br/><br/>She asks ChatGPT if her attorneys are lying to her. It says they are. She fires them and continues pro se, advised by ChatGPT.<br/><br/>CharGPT generates legal arguments for reopening the case, which she files, and 21 more motions, a subpoena, and eight other notices and statements, which she files.<br/><br/>The court denies her motion to reopen the case.<br/><br/>Advised by ChatGPT, she files a new suit against the insurance company and submits 44 more motions, memoranda, etc., which include citations to nonexistent cases.<br/><br/>Now the insurance company has sued OpenAI for tortious interference with their settlement contract.<br/><br/>🍿 <br/><br/><a href="https://storage.courtlistener.com/recap/gov.uscourts.ilnd.496515/gov.uscourts.ilnd.496515.1.0_1.pdf">https://storage.courtlistener.com/recap/gov.uscourts.ilnd.496515/gov.uscourts.ilnd.496515.1.0_1.pdf</a> 2026-03-13T23:12:50Z https://yabu.me/nevent1qqs8pm5wapj7wal5vma05s38kw47u3m0r80zcnra7ccpkue2tmzsx6gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26m583uv My under-desk floor mat<br/><br/>#tilingTuesday<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/205/187/162/795/002/original/298af73d946aa843.jpg"> <br/> 2026-03-10T13:47:25Z https://yabu.me/nevent1qqsd0qvpgt6v5tq2kla0ntadpp8d2rd6f894zc5smpyg55a7gtzcswqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26fmmr9c In reply to <a href='/nevent1qqsvp78w66zsuxcjtzsx997k3llnr2wt76fwk8dv2rr35cndpn73geqtadtmm'>nevent1q…dtmm</a><br/>_________________________<br/><br/>You are right! But until you said it, I didn&#39;t know. 2026-03-01T10:34:16Z https://yabu.me/nevent1qqsg6xzmcncq7dtzqr60tuf858xes8gmztde0xhq8wl5xugach9v49qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h268hju85 #textureTuesday<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/126/598/295/725/507/original/24f44c0d039dfbda.jpg"> <br/> 2026-02-24T16:41:16Z https://yabu.me/nevent1qqs247uqml0wkx2k6q3fzcg99lf8d0mfgfz6u0996aa6h9a55zm83mczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26qwyd0p In reply to <a href='/nevent1qqsfp7gc6xy83k36955nammpqvxq5lu06rhkstrhl8hwpccyp448fys2gcq9g'>nevent1q…cq9g</a><br/>_________________________<br/><br/>At last I understand why so many CT scanners are equipped with snooker tables! 2026-02-23T13:40:58Z https://yabu.me/nevent1qqsp7y02w3vlarfxhghgt9cs8xjzkgjh3ekuptk8jrz5s4xucs5sseczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26y60mrg “Most electronic shopping cart wheels listen for a 7.8 kHz signal from an underground wire to know when to lock and unlock. A management remote can send a different signal at 7.8 kHz to the wheel to unlock it. Since 7.8 kHz is in the audio range, you can use the parasitic EMF from your phone&#39;s speaker to ‘transmit’ a similar code by playing a crafted audio file.”<br/><br/>This sounds improbable but I needed to use it just now and it worked both times.<br/><br/><a href="https://www.begaydocrime.com/">https://www.begaydocrime.com/</a> 2026-02-21T18:29:14Z https://yabu.me/nevent1qqs9g462hnrx8556qry6x2m3zdrfp57cd5f8t4hcq5vhgueh924lgdczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h2690tpw2 In reply to <a href='/nevent1qqsf5cvmuu5shqrunj652sz3zwnegenny704ktzdtlq7nsk8942w3egmn2ske'>nevent1q…2ske</a><br/>_________________________<br/><br/>I keep thinking about that incredibly creepy story you wrote about the kidnapping. 2026-02-20T08:10:49Z https://yabu.me/nevent1qqsf7v5eevrrxmn3j85ncc5ch73xfztngrdg3acfvrm662c0v6srndgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26rr7mgh In reply to <a href='/nevent1qqs0glcjwaedmjkj2gc9n4dwfrdsmhgw7ysecaur0g0qencnqdesuwq8lwxdd'>nevent1q…wxdd</a><br/>_________________________<br/><br/>This use of “gore” is from an older word “gar” meaning a spear. It&#39;s the origin of several common words:<br/><br/>* When the bull gores someone with his horns, it&#39;s because he&#39;s spearing them<br/>* The gar fish is so-called because it&#39;s spear-shaped (See figure 1)<br/>* The garlic plant is a gar-leek because it&#39;s like a leek, but with long pointy leaves like a spear (this sounds like something I would make up, but it isn&#39;t)<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/053/057/605/517/762/original/abd77bc198298586.png"> <br/> 2026-02-11T16:59:42Z https://yabu.me/nevent1qqs0glcjwaedmjkj2gc9n4dwfrdsmhgw7ysecaur0g0qencnqdesuwqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26tmm372 In reply to <a href='/nevent1qqsfs4ulh30t3ehhtxdmtq40434qpcc9uj6sdeukhvrkrjrc67tpqfs8kq7g2'>nevent1q…q7g2</a><br/>_________________________<br/><br/>Check out &#34;theoretical gore&#34; in this illustration. (Upper right.) &#34;Gore&#34; is actually a rather old word for a triangular-shaped piece of land. (Also a for triangular-shaped piece of fabric in a garment, and more generally for anything spear-shaped.) <br/><br/>In highway design, the “theoretical gore” is the triangular part of the road between the main way and the exit way, the part with white strips that you&#39;re not supposed to drive on.<br/><br/>The “physical gore” is the sort of armpit place _off_ the road that you will crash into if you keep driving on the theoretical gore.<br/><br/>I ❤️ #jargon<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/053/019/984/505/538/original/47e19d993881f0fc.png"> <br/> 2026-02-11T16:51:10Z https://yabu.me/nevent1qqsfs4ulh30t3ehhtxdmtq40434qpcc9uj6sdeukhvrkrjrc67tpqfszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26vcuasm I was skimming through the Manual on Uniform Traffic Control Devices yesterday, and thinking, as I often do, that one of the finest things in the U.S. is our highway signage. No joke, I am really proud of our achievements here. They are a triumph of civic administration and a valuable application of our affluence for the public good.<br/><br/>(The manual is available online for free and will be of great delight to many varieties of nerd: <a href="https://mutcd.fhwa.dot.gov/kno_11th_Edition.htm">https://mutcd.fhwa.dot.gov/kno_11th_Edition.htm</a> )<br/><br/>And then I thought it&#39;s probably only a matter of time until the current administration figures out a way to line their pockets with highway sign funds, announces that highway signs are Fake News and Woke and fucks them up somehow or eliminates them entirely.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/052/990/000/172/406/original/75921a9bac21279c.png"> <br/> 2026-02-11T16:42:52Z https://yabu.me/nevent1qqsfjvkaklr324eh4kjn0j20skurmulaekwdqjezkzfp477cjy9lhuczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h265rhdct Did you know? If you want to _mention_ a hashtag like #lichenSubscribe, but you don&#39;t want followers of that hashtag to be alerted to your post (because it isn&#39;t actually about lichen) you can set the post&#39;s “visibility” to “quiet public”?<br/><br/>It will still be visible to everyone, including your own followers as usual, it just won&#39;t alert strangers who are following the hashtag and it won&#39;t show up in searches for that hashtag.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/116/036/379/238/034/773/original/33d05c18c70524fe.png"> <br/> 2026-02-08T18:19:25Z https://yabu.me/nevent1qqsgknh4w02rf0jajmvlu56za67lxffvpm5maqe8qxlnkdzpgquxmxszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ps79yx RE: <a href="https://mathstodon.xyz/@mjd/115968091585502218">https://mathstodon.xyz/@mjd/115968091585502218</a><br/><br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1ftlrl36zhu09klw5qt75ksjd8z8wafzp37ht2h3d2uzjmnr9eeesu83e6s" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Brewster Kahle</span> (<span class="italic">npub1ftl…3e6s</span>)</a></span> <br/><br/>Nobody had an answer to this.<blockquote class="border-l-05rem border-l-strongpink border-solid"><div class="-ml-4 bg-gradient-to-r from-gray-100 dark:from-zinc-800 to-transparent mr-0 mt-0 mb-4 pl-4 pr-2 py-2">quoting <br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Article"><a itemprop="url" href="/note1endh0hjg887julqcwa0pmntzgechyzfuq0w0779vca2ga6fjxjzqtftdc7" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1">note1end…tdc7</a></span><br/> </div> I am looking on the Internet Archive for a downloadable copy of Kierkegaard's _Fear and Trembling_. I don't see any way to restrict the search to items that are downloadable. Instead I have to click on each one in turn, only to find that it is a read-online with a one-hour borrow time, or that it is available only to visually impaired readers, or whatever.<br/><br/>What am I missing?<br/><br/><a href="https://archive.org/search?tab=texts&query=%22fear+and+trembling%22&and%5B%5D=collection%3A%22internetarchivebooks%22">https://archive.org/search?tab=texts&query=%22fear+and+trembling%22&and%5B%5D=collection%3A%22internetarchivebooks%22</a> </blockquote> 2026-02-02T16:27:21Z https://yabu.me/nevent1qqs2crx8kv5nq7tfrz8ayra25s3cfnpumurxrt5nmqrac2mhfcaspkgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ydx9n5 In reply to <a href='/nevent1qqsf8qem2m8c242pev724ry0n808e2mv5lz3fjn8xw7v203w4n4d4mg8hsm32'>nevent1q…sm32</a><br/>_________________________<br/><br/>I figured it out: it was <a href="https://www.rfc-editor.org/rfc/rfc9839.html">https://www.rfc-editor.org/rfc/rfc9839.html</a> 2026-01-30T19:58:52Z https://yabu.me/nevent1qqsrj5xw9re5knaqa6sa6dxr876ulk04wlzf2gvnxmc7ehtjsmknzyczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26qdaa9n <span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1qw6vqcz3kc7d6ccfegyw3azkj805rzrvugrdqxxp0waampp74fdsjsxm8d" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Tony Finch</span> (<span class="italic">npub1qw6…xm8d</span>)</a></span> I&#39;m sure I recently read a good blog post with a simply formula for the three kinds of Unicode characters that should be filtered from user input, but I don&#39;t know who wrote it or where it was. Does your link log have anything like that?<br/><br/>It&#39;s for this person: <br/><br/><a href="https://lethargic.talkative.fish/@suricrasia/statuses/01KG6HET8WZNMWECWFYNC9MTQS">https://lethargic.talkative.fish/@suricrasia/statuses/01KG6HET8WZNMWECWFYNC9MTQS</a> 2026-01-30T14:28:35Z https://yabu.me/nevent1qqsw7zypzx0d5hprszapl77kps8hxd0s50uvx97wh5t07sy4p24xjxszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26wefrvv How this morning is going: “Why the hell isn&#39;t my mouse working?… Oh.”<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/979/438/448/187/096/original/5c8fd4fb332a43f4.jpg"> <br/> 2026-01-29T16:57:31Z https://yabu.me/nevent1qqsvekmhmeyrnlfw0sv8whsae43yvutjpy7q8h8l0zkvw4ywayerfpqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26x7j9dy I am looking on the Internet Archive for a downloadable copy of Kierkegaard&#39;s _Fear and Trembling_. I don&#39;t see any way to restrict the search to items that are downloadable. Instead I have to click on each one in turn, only to find that it is a read-online with a one-hour borrow time, or that it is available only to visually impaired readers, or whatever.<br/><br/>What am I missing?<br/><br/><a href="https://archive.org/search?tab=texts&amp;query=%22fear+and+trembling%22&amp;and%5B%5D=collection%3A%22internetarchivebooks%22">https://archive.org/search?tab=texts&amp;query=%22fear+and+trembling%22&amp;and%5B%5D=collection%3A%22internetarchivebooks%22</a> 2026-01-27T16:50:47Z https://yabu.me/nevent1qqsdl5p3njdz9zy5g8rrca0r0gf6mwsxcanfz966dmprujuqz2nh9eczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26lsnmj8 In reply to <a href='/nevent1qqs2zyay9a97jxcpdlw47nqt7d3a5ut7eaa9q2kr5lxyg93p2twwc2g5g4wdm'>nevent1q…4wdm</a><br/>_________________________<br/><br/>Current frittata:<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/959/225/350/708/748/original/e285be07f9479573.jpg"> <br/> 2026-01-26T03:16:13Z https://yabu.me/nevent1qqs2zyay9a97jxcpdlw47nqt7d3a5ut7eaa9q2kr5lxyg93p2twwc2gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h260dk0dt This is obvious in hindsight, but making a Sunday night frittata is a good way to use up the week&#39;s leftovers.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/883/662/725/091/599/original/02b5795fb33f5e54.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/883/662/724/776/209/original/15e29ef6418c548c.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/883/662/725/091/600/original/fa4567c6b62ecb19.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/883/668/113/928/129/original/4c73c8fbfbdc58eb.jpg"> <br/> 2026-01-12T19:01:11Z https://yabu.me/nevent1qqswnzda9szu442qvty5m4daecgltdj6qam4xedeuevvwrg9ulhel5qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26hgcn23 One of the cooler things I saw in the Corning Museum of Glass was this chandelier made of blue glass butterflies. The butterflies are actually made of recycled solar cell material, and they&#39;re wired up so that the chandelier lights up with no external power source, the power is supplied by the butterflies themselves.<br/><br/><a href="https://glasscollection.cmog.org/objects/58287/virtue-of-blue">https://glasscollection.cmog.org/objects/58287/virtue-of-blue</a><br/><br/>#CMoG<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/865/480/974/023/923/original/c0d24346155aba83.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/865/481/372/384/510/original/09fd983f5b25fc99.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/865/481/846/191/900/original/37e6e34e7fa47bc0.png"> <br/> 2026-01-09T14:00:28Z https://yabu.me/nevent1qqswrje5e23uqayu42y54a6e5fa0ds4ajwuqfa25k3qysfnv4pg3t0czyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26qq9yt6 I did Google search just now for Padraic Bartlett&#39;s excellent lecture notes on spectral graph theory, and discovered that most of the top hits were for my web site, where I had archived them after last time I went looking for them, apparently in 2011. Perhaps foreseeing exactly this moment.<br/><br/>Spectral graph theory is wild. It treats graph adjacency matrices as actual _matrices_ and asks what you can learn about the graph from studying the eigenvalues of the matrix and such like. <br/><br/>If someone had asked me about this before I knew the answer, I would have guessed that there was pretty much nothing you could extract from the eigenvalues of the adjacency matrix. But the opposite is true.<br/><br/><a href="https://www.plover.com/misc/math/Spectral%20Graph%20Theory/">https://www.plover.com/misc/math/Spectral%20Graph%20Theory/</a> 2026-01-02T19:45:37Z https://yabu.me/nevent1qqsv4w7jglepjy808c720x29mzkq88gm5yjwytqygm436aazxfyctuczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26haq2l9 For 2026 I have resolved to cease my wasteful use of double leters.<br/><br/>Hapy new year! 2026-01-02T07:03:40Z https://yabu.me/nevent1qqsdh5ty8pt8g743um6jznd455e67nrktds5eeq5tt0zet037g6a2hgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h267xu2cs In reply to <a href='/nevent1qqs0mynvd0se5rgvf50ch5aydx2l2vem6t3zp9nel2ln3yz28dpgxtcdphwrt'>nevent1q…hwrt</a><br/>_________________________<br/><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/798/643/889/167/468/original/33d46750a12717ec.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/798/643/904/033/603/original/a5f36ff515f09b00.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/798/643/893/735/101/original/8468bb4b0310dfb8.jpg"> <br/> 2025-12-28T18:38:11Z https://yabu.me/nevent1qqs0mynvd0se5rgvf50ch5aydx2l2vem6t3zp9nel2ln3yz28dpgxtczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h263c8hdk There are six possible axial orientations of an almond in a nutcracker and to my mind one of them is clearly superior to the others.<br/><br/>(Inspired because yesterday I met a grown man who did not know how to crack an almond.)<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/798/642/328/774/545/original/e059158be6ee1913.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/798/642/332/314/674/original/fe236769753d14cb.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/798/642/334/746/841/original/78d7cf9bfa73d215.jpg"> <br/> 2025-12-28T18:37:44Z https://yabu.me/nevent1qqs9kdz0sw3ml87gx4luycdjvzuernfppcvp7km7xq6zl8g97hmnrkszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26jk7c2h Lately I&#39;ve been puzzling about the confusingly abstract English word “condition”, trying to think how I would explain it to an English language learning person.<br/><br/>1. I will go with you, on one condition:…<br/>2. What condition is your car in?<br/>3. Air conditioner<br/>4. Conditional statements<br/>5. ??<br/><br/>I haven&#39;t found a challenge this hard since “even”. 2025-12-28T15:33:13Z https://yabu.me/nevent1qqs0kwr694cw344jsk5ak0qmp80jp93ytzwln73d9dmcytx326p23ugzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26a8rjn9 In reply to <a href='/nevent1qqs922dyck6xk06dlplezmf8sj5pdptjc9aw5q4s54qkq2ec2kn9dlgy4xzvz'>nevent1q…xzvz</a><br/>_________________________<br/><br/>I once read a story about the people writing the software for the NASA Apollo missions. There was a functionary in charge of weight accounting, who came to them and asked how much the software would weigh.<br/><br/>They told him it weighted nothing, but the functionary had heard *that* one before and insisted—everything had to be accounted down to the last ounce. He demanded to see it.<br/><br/>They showed him a stack of punched cards, and he was triumphant. “You see,” he said smugly, “it doesn&#39;t weigh only ‘nothing’!”<br/><br/>“No, you misunderstand,” they replied. “The cards aren&#39;t going on the spacecraft. Only the holes.” 2025-12-20T13:06:06Z https://yabu.me/nevent1qqsqakcuwl8gn4malu2c0xr8tgwusy8h8x6frd895ykj42nxhguajvczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26glsxqg In reply to <a href='/nevent1qqsxcehk8v0lkv6qfhn28zt5ra93rd9hq96qmpngqddrlvcn8yks9vcqdka94'>nevent1q…ka94</a><br/>_________________________<br/><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/726/035/218/061/557/original/d89abcaa36612df4.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/726/036/894/109/785/original/b8ac30941e9f035a.jpg"> <br/> 2025-12-15T22:53:16Z https://yabu.me/nevent1qqsxcehk8v0lkv6qfhn28zt5ra93rd9hq96qmpngqddrlvcn8yks9vczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26h0craf In reply to <a href='/nevent1qqs82l7ntthj6esxr7hzgahpuw65gpd2vr25rn76ptnh3m2r630sclg4a9wqn'>nevent1q…9wqn</a><br/>_________________________<br/><br/>“The other thing is something that&#39;s been bugging me for years, which is programmers …”<br/><br/>(Long pause)<br/><br/>“You know, let&#39;s just stop the talk right there.”<br/><br/><a href="https://youtube.com/watch?v=-HlGQtAuZuY#">https://youtube.com/watch?v=-HlGQtAuZuY#</a> 2025-12-15T22:49:02Z https://yabu.me/nevent1qqs82l7ntthj6esxr7hzgahpuw65gpd2vr25rn76ptnh3m2r630sclgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ncge48 I&#39;m sitting on the sofa watching a recording of a talk I gave in 2014 and I realize that in the video I&#39;m wearing the same sweater I have on right now. 2025-12-15T22:43:32Z https://yabu.me/nevent1qqs87xxy74lnqn98uccwn35lwlq7kqkkymuu5ncznsks3zdczm2wxgszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h2670j3rx RE: <a href="https://fandom.ink/@Rozzychan/115714715047589920">https://fandom.ink/@Rozzychan/115714715047589920</a><br/><br/>#shareGoodNewsToo<br/>nostr:note1rk8s9xqchk6azamcccffag2fgua6jwpdlaudnuff3pesyhy3jrxsux89nt<br/> 2025-12-14T17:23:41Z https://yabu.me/nevent1qqsdyh6jtyyyj5cftendftth2afmu0a93xljx77paveawk9vvdejxcgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26dtqc8d Today I learned about phytoliths.<br/><br/><a href="https://en.wikipedia.org/wiki/Phytolith">https://en.wikipedia.org/wiki/Phytolith</a><br/><br/>(White scale bars in the pictures are 20μm)<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/603/886/877/996/764/original/438465f7801bed27.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/603/886/877/146/959/original/7140c3b0665e36dc.png"> <br/> 2025-11-24T09:09:49Z https://yabu.me/nevent1qqst7jal9wvazmc9a0vrjy3rlpjlh42rnge9uwjs0qxuldc5jyee5qszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ssqdcp About thirty years ago I did a project to enumerate all the quilt blocks of a certain type.<br/><br/>Designs must be made of sixteen of these square components with two opposite-color triangles. They must have fourfold rotational symmetry. Two designs are considered the same if they are reflections of one another, or obtained by exchanging black and white.<br/><br/>There are 72 such designs. I made a mistake and rendered one twice. Can you find it?<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/555/947/227/903/309/original/c7d59f099f11fd74.jpg"> <br/> 2025-11-15T21:57:17Z https://yabu.me/nevent1qqstqjx49cj3ewg98shh7hgygy2cfwte0cgxg5cqyv770khw2v82c2gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26h3upzr In reply to <a href='/nevent1qqs03q0ee3s548rw76n60xndtj0vrd5k6rqeh3qh4yxkmfgapw5p0qcwjdu2g'>nevent1q…du2g</a><br/>_________________________<br/><br/>I apparently had a lot of fun with this.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/715/734/338/954/original/e51440b1304efb03.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/715/744/905/071/original/3a82614f438a84e0.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/715/748/538/857/original/5fdbdf6ef7153a1a.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/715/749/095/002/original/a7a057e26eb017b8.jpg"> <br/> 2025-11-10T18:03:24Z https://yabu.me/nevent1qqs03q0ee3s548rw76n60xndtj0vrd5k6rqeh3qh4yxkmfgapw5p0qczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h260kxjxp I haven&#39;t looked at the Higher-Order Perl errata pages for years, so I had forgotten this detail. All the other pages on the site have a picture of the book cover. But each errata page has instead a random selection from a set of 17 erroneous covers. Some examples:<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/694/930/724/578/original/234d8d6179c094bc.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/694/955/026/502/original/15139d7daaa763e7.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/694/971/460/191/original/6c3f8af9d84107a8.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/526/694/980/384/037/original/4d20f1541677e580.jpg"> <br/> 2025-11-10T17:58:48Z https://yabu.me/nevent1qqsr7w2chxlr0tzjscajjsn0rer98c2dt67atzz4j0mqgtrt3usx2tgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26s86c9l Today&#39;s the fifth anniversary of the infamous Four Seasons Total Lanscaping press conference! Best wishes to all who celebrate!<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/511/297/710/775/963/original/04adb677af252f35.jpg"> <br/> 2025-11-08T00:42:13Z https://yabu.me/nevent1qqstf9x5u33qpfapngj3vszul7nkfvdzar9nz8syt8a5w65udllsf4qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26hzdpua <span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1rrgg5nnnxd7hn47ctnwn5zatclapjyv4ghw2u6jdxgkfqfmhxrksuxp8jc" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>frew</span> (<span class="italic">npub1rrg…p8jc</span>)</a></span> At the Philadelphia Museum of Art annual craft show<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/509/380/174/962/189/original/6a76fa01eb6ccf1d.jpg"> <br/> 2025-11-07T16:34:49Z https://yabu.me/nevent1qqsd4jazhjaytwtqjwlld8w047z25fwqjlvwgx77gplvmw7hcekppwgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26tk9nus U.S. food assistance benefits won&#39;t go out timely in November. Working single moms won&#39;t be able to buy food for their little kids or formula for their babies. Housebound old and sick people who need meals delivered won&#39;t eat. Good people are going to die.<br/><br/>Please donate CASH to your local food bank. The food bank is a very efficient use of your charity money. $0.75 turns into at least one full meal delivered to someone who needs it, maybe more.<br/><br/>Definitely don&#39;t buy canned goods to donate. Just give the food bank the money instead. You&#39;ll be feeding five times as many people.<br/><br/>A web search for “New Orleans food bank” or whatever will get you to a page where you can donate. 2025-10-28T08:56:04Z https://yabu.me/nevent1qqs8je9arvxvvwp2kda747jldr3l07pk0zfwju2yu5z0resj2rfk5xqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26sd6ls8 In reply to <a href='/nevent1qqsyn96r3m6w8c09q37kev3w9fm0nnqpxequahnsgnezkaj27y5drzczht534'>nevent1q…t534</a><br/>_________________________<br/><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/435/444/723/931/840/original/ac01fd3635e7c412.jpg"> <br/> 2025-10-25T15:11:50Z https://yabu.me/nevent1qqst7zl7z8dzf0hcfmuumqjj7elrx4va88j3dj9y9t833v2fvmy78hqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26vedyt7 In reply to <a href='/nevent1qqswg5cts9w6m94muc98yguphpewyunucuz6tyfvzw2axl0agyruu9gh62lf3'>nevent1q…2lf3</a><br/>_________________________<br/><br/>It failed right out of the gate there. I&#39;d quote more, but it&#39;s more of the dismal same.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/423/729/599/525/872/original/b447f1c5b088eed4.png"> <br/> 2025-10-23T13:33:15Z https://yabu.me/nevent1qqs8fst6368v7fkc8n5k2z74llcqfdnw0l42u2hjh2nlt7jd63uancqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26exaq8y In reply to <a href='/nevent1qqs2xruujjgzkq92lxy0z8vxx25pyvhz9hz7ygcv09x8x7rgvrf2vfsq3s8um'>nevent1q…s8um</a><br/>_________________________<br/><br/>This very similar example came through my timeline yesterday.<br/><br/><a href="https://mathstodon.xyz/<span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1s7thnp4t2vyjn7a2tsa2q8s4rc6wu9ekvh3sejfjtjl4f9uv7drqe3xfa0" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Nikita Lisitsa</span> (<span class="italic">npub1s7t…xfa0</span>)</a></span>/115414829655492335">https://mathstodon.xyz/<span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1s7thnp4t2vyjn7a2tsa2q8s4rc6wu9ekvh3sejfjtjl4f9uv7drqe3xfa0" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Nikita Lisitsa</span> (<span class="italic">npub1s7t…xfa0</span>)</a></span>/115414829655492335</a> 2025-10-22T15:02:30Z https://yabu.me/nevent1qqsygfpe7fpe30prpuurda55m4j0ejfdn8rhmn4tz4y0dcp4vthgqvqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26yckp45 <span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1c5y93tlt8rwc7tz39xl5qzkc3uw99u2ezmyxxpsphh6eurz30gwsj7cvcq" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Gene Boggs</span> (<span class="italic">npub1c5y…cvcq</span>)</a></span> This is a really cool picture.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/407/046/003/036/135/original/a7b9a72f761aedcc.png"> <br/> 2025-10-20T14:49:36Z https://yabu.me/nevent1qqswnmakv3lpexkqn2qmm4xkvxwyuvp0kfz9fm9tlqe6zzpklqhw42szyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26vrtrst Seaforest Bakeshop is a new Korean-inspired bakery in Philadelphia. Here is their wrapping paper. (I met the baker today. She looks JUST LIKE the cartoon version of her.)<br/><br/>They&#39;re at 16th and Bainbridge. I recommend a visit.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/401/454/229/352/537/original/af7d0ce4f376f151.jpg"> <br/> 2025-10-19T15:08:10Z https://yabu.me/nevent1qqsgnys46xunag7yfctk09rdxqufgehcflc2nks8p5vleh26w32558qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ywzhhz Who&#39;s this on the gates of the Greek Orthodox Cathedral of St. George in Philadelphia?<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/396/840/756/839/180/original/1d4ac737321a3922.jpg"> <br/> 2025-10-18T19:34:43Z https://yabu.me/nevent1qqs0tauu2xzyp5y6tdccjes0ltpn9fwqe6wnnpjarwavpyrv75sjvtgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26226qzm Why does Skyrim look to me like a full-scale world, a real place, and the world of The Outer Worlds seems small and fake, like a dollhouse? (Skyrim screenshots are the ones with the stone towers.)<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/374/164/220/747/383/original/810d7a26e4c9dde7.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/374/164/226/240/750/original/c5ff96d991055cc6.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/374/164/225/427/572/original/5641c061061d8af4.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/374/164/225/350/807/original/ba559a19df776660.jpg"> <br/> 2025-10-14T19:28:36Z https://yabu.me/nevent1qqsx8tpdpgututyxmh7dzrre94kr5m30aujx2utdg3gn3u3t92ewt3gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26sfjpfj “Eastern Australian humpback whale population now well above pre-whaling levels, report finds”<br/><br/><a href="https://www.abc.net.au/news/science/2025-10-07/humpback-whales-eastern-population-numbers-rebound-estimate/105843256">https://www.abc.net.au/news/science/2025-10-07/humpback-whales-eastern-population-numbers-rebound-estimate/105843256</a><br/><br/>#shareGoodNewsToo 2025-10-14T11:22:49Z https://yabu.me/nevent1qqstgv994trhyd9elpzlg2w8mjkrwe07zwfhqcaw3n985qswh0akd7gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26yjdk5r Top comment “That’s an icosahedron you uncultured swine”<br/><br/>Second place: “A NEW HAND TOUCHES THE BEACON”<br/><br/><a href="https://www.reddit.com/r/BrandNewSentence/comments/1o5tc5i/the_guy_next_to_us_on_this_flight_straight_up/">https://www.reddit.com/r/BrandNewSentence/comments/1o5tc5i/the_guy_next_to_us_on_this_flight_straight_up/</a><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/371/702/620/477/743/original/12751ac1dcecf16f.jpeg"> <br/> 2025-10-14T09:02:57Z https://yabu.me/nevent1qqs2kslcqh8f63950ss2jfhc6mc2v555pwcqpwly2aslzj3yw4v2wvczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26kkmx9c Thinking about how to count these rectangle-ominoes. There&#39;s one of size 1, three of size 2, and rather a lot of size 3. When two tiles touch, they must have at least one vertex and part of the edge in common.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/357/236/272/852/527/original/144afef91ba0f08f.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/357/238/360/158/030/original/6a689caaefb02b67.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/357/238/380/400/406/original/4bf4737bc8665c25.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/357/238/380/288/391/original/64803cb4bf0f6219.jpg"> <br/> 2025-10-11T19:42:57Z https://yabu.me/nevent1qqsfn6vka29uucu75pnsc0szc3qfw8ckapepv9segy7yrcwfscv5y4gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26wauysz Happy #worldOctopusDay everyone! (It&#39;s the 8th of October.)<br/><br/>Since 2010 or so Lorrie has been making these little felt octopuses. She&#39;s made about 3,000 of them and despite having sold and given away many there are still quite a few in our house, lurking about. Here&#39;s the most recent batch, fresh from the Felting Spa.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/341/755/641/172/050/original/8a7f2e0e04c05350.png"> <br/> 2025-10-09T02:05:34Z https://yabu.me/nevent1qqsxh3pqfswyt7zxfzjgm6tczqajxxs5qncpeml38yflqpkqdkvc82qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h262pprk4 Fun 1904 Cyrillic alphabet book for kids, by AlexandreNikolayevich Benois (Алекса́ндр Никола́евич Бенуа́). Depicted below the pages for ц (“ts” for &#34;tsaritsa&#34; (царица), &#34;queen&#34;) and ч (&#34;ch&#34; for &#34;chuchelo&#34; (чучело), &#34;dummy&#34;).<br/><br/><a href="https://archive.org/details/gri_33125014180802/page/n29/mode/2up">https://archive.org/details/gri_33125014180802/page/n29/mode/2up</a><br/><br/>Content warning: letter &#34;А&#34; is an unusually racist caricature of an &#34;Arab&#34;.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/339/476/302/277/127/original/868a22f7a9204fa4.png"> <br/> 2025-10-08T16:28:58Z https://yabu.me/nevent1qqsd9tfwjmd9akszycnts6zwkwfvlaylhnx3apytmy5gpssgk6p9r9szyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26afl0e9 In reply to <a href='/nevent1qqsxxvp9x84m3lfyv305j4euf0uc7w5hmmsk3g2yfxj9vt94w727jkc0w82dq'>nevent1q…82dq</a><br/>_________________________<br/><br/>I would be surprised if it were that simple. Consider this problem with the same flavor: four houses lie at the vertices of a one-mile square in a woods. We would like to construct a road network that provides a route from each house to the others, using the smallest possible amount of road.<br/><br/>If we build roads on three sides of the square, that&#39;s 3 miles of roads.<br/><br/>If we build an X with the crossroads at the center, that&#39;s better, around 2.8284 miles.<br/><br/>But the optimal network uses only 2.732 miles of road, as in the diagram.<br/><br/>See <a href="https://en.wikipedia.org/wiki/Steiner_tree_problem">https://en.wikipedia.org/wiki/Steiner_tree_problem</a><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/328/718/800/649/576/original/00ca0159c3ddb7ee.png"> <br/> 2025-10-06T18:50:55Z https://yabu.me/nevent1qqs0tw2uzu0hkdmfe25fdplg7fmvcp8fq2y0ac8526s7t0yeju46q9gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26xa847h Székelykáposzta<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/324/471/747/873/040/original/db0a5880e9d56111.jpg"> <br/> 2025-10-06T00:50:15Z https://yabu.me/nevent1qqs0l3gzjkc7vy8e69n77qcpm4cutjmsgyc56d7n8awcf5rard00dvqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26j3m4ga I have to assume that this band (2nd from right) is named for Harry Mathews&#39; novel “Tlooth”. It can&#39;t be a coincidence, right?<br/><br/><span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1l83sdgea94y72mzv2hpxae4nktngdua6y86vv5f0u0nvtec8srgq353zmk" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>ranjit</span> (<span class="italic">npub1l83…3zmk</span>)</a></span><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/271/145/303/345/305/original/e9676e56e9ecee50.jpg"> <br/> 2025-09-26T14:49:42Z https://yabu.me/nevent1qqs8ddxf8fvevq8485vk25jlp0ayvcu2jnudag5mf0wlnp5aaen9uuszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26jhj9vd In reply to <a href='/nevent1qqsrsew98uh9pdt6utsdptn2un9wzr2jynzw8vcycv0znm0799lllrggt538j'>nevent1q…538j</a><br/>_________________________<br/><br/>“Academia.edu is proud to announce that, as part of our company&#39;s commitment to DEI, starting from Q1 2026 we will begin accepting first-born daughters as well as sons.” 2025-09-23T14:41:40Z https://yabu.me/nevent1qqsxhl596xh600a0a0ht8gthsj6u908jlufylnjgjapqtrkcrceu8gqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26caytkq Okay, what if we took Peanuts comics and redrew them so that instead of a dog, Snoopy was a kid in a gimp suit?<br/><br/>He&#39;d still live in Charlie Brown&#39;s backyard and eat from a dog bowl, of course.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/227/545/629/571/931/original/a083f9320db19534.jpg"> <br/> 2025-09-18T22:00:19Z https://yabu.me/nevent1qqsq79jeuse4rj0w97dd9psxncxt7xhn9yyx2n9y2e56tmmpwwnrzfczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26tlzggn In reply to <a href='/nevent1qqszh0m0vc9u4yc8r3wkzcyma9r6sepfdrvv52d5w3arq02xv40n7nc7puupe'>nevent1q…uupe</a><br/>_________________________<br/><br/>I think there&#39;s no &#39;b&#39; until &#34;billion&#34;. 2025-09-18T20:50:54Z https://yabu.me/nevent1qqsgdndnx680nvq0vrmug58s0xv2c62rn09mlq4z2ar5k4rjgesu49qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26zmxtwk In reply to <a href='/nevent1qqswp8r2j2rdm280jfkjy2lzug98xk425x7c8fg23d6rlz8frlmavcs07usz7'>nevent1q…usz7</a><br/>_________________________<br/><br/>I don&#39;t know why I thought it was called that, some metaphor maybe, or some Lao word that happened to sound sort of like English “jars”. <br/><br/>Nope. Literal jars.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/200/381/987/446/265/original/d239b66d6676e7f7.png"> <br/> 2025-09-14T02:52:12Z https://yabu.me/nevent1qqswp8r2j2rdm280jfkjy2lzug98xk425x7c8fg23d6rlz8frlmavcszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ndjvs9 Today I learned that the Plain of Jars is so-called because it is covered with actual jars, large stone jars. 2025-09-13T22:30:37Z https://yabu.me/nevent1qqsdrhfhlqq8ttdeetnq5rghcegtuu87pggrzw97uf5rcff8qrlpzcgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26rsl6ca #itsAlwaysPokeweed<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/197/624/486/352/373/original/b5f1c45e1038b1f8.jpg"> <br/> 2025-09-13T15:11:02Z https://yabu.me/nevent1qqszkr82d6fnejzhafc22yxg9crugnayd2n9hudfclvyvhmg300z7ngzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h265grrnw In reply to <a href='/nevent1qqstkts0rkt65eeu9k3gn8aq7sw5qvnayqqhdqx7vfkv6c52qc0dctg5e8cvn'>nevent1q…8cvn</a><br/>_________________________<br/><br/>Have you seen this? <a href="https://www.thenation.com/article/politics/charlie-kirk-assassination-maga/">https://www.thenation.com/article/politics/charlie-kirk-assassination-maga/</a><br/><br/>“Joseph Goebbels was a gifted marketer and loving father to six children.” 2025-09-13T14:40:26Z https://yabu.me/nevent1qqsthr6j3h3dhez93auvu4xsqkyuehzucx6d46z6zkjjasqxfaqdcaczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ht4jdz In reply to <a href='/nevent1qqsg79aw5cu4y8g3azg5agreh3597aryc2ghwar5qeqxqffz9vyp36qavd6l0'>nevent1q…d6l0</a><br/>_________________________<br/><br/>I once read somewhere that if you are having dinner with strangers and you want to know if any of them is a computer programmer, you can ask if anyone there has an opinion on time zones. Normal people will shrug. Programmers will scowl and start to bang their fists on the table. 2025-09-08T12:09:03Z https://yabu.me/nevent1qqsg79aw5cu4y8g3azg5agreh3597aryc2ghwar5qeqxqffz9vyp36qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26l66hgy In reply to <a href='/nevent1qqsd7yf5as557pefc32k44j6sv9gxqc5djttgzqx5farwdex3vl9kxspxmq49'>nevent1q…mq49</a><br/>_________________________<br/><br/>The fundamental problem with all date-time libraries is this: there are two kinds of objects we need to model.<br/><br/>One is actual times, which (ignoring relativistic effects) are the same everywhere. If I call my mother-in-law in Seoul, the conversation happens at the time time for her as it does for me, regardless of what those times might be _called_.<br/><br/>The other kind of object is _labels_ for times or _descriptions_ for times. If I call Seoul at Mon Sep 8 03:31:11 AM EDT 2025 US/Eastern, that time is also _called_ Mon Sep 8 16:31:11 AM EDT 2025 Asia/Seoul. Two different labels for the same thing.<br/><br/>But every date-time library I&#39;ve ever used has conflated or confused these two concepts. 2025-09-08T11:57:26Z https://yabu.me/nevent1qqsd7yf5as557pefc32k44j6sv9gxqc5djttgzqx5farwdex3vl9kxszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h2698vw2q In reply to <a href='/nevent1qqsz9xln85gsefmmknvt74yuyd43he7a7u3lz3ahquf75rs7626ydfqh6xjyk'>nevent1q…xjyk</a><br/>_________________________<br/><br/>I was going to go into detail about where the *fundamental* problem is, not just in Python but in Perl and every other date-time library I&#39;ve ever used, but after I thought about it for a few minutes I remember I wrote it up already, like ten years ago. But it never changes. 2025-09-08T01:15:35Z https://yabu.me/nevent1qqsz9xln85gsefmmknvt74yuyd43he7a7u3lz3ahquf75rs7626ydfqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26t34yxr In reply to <a href='/nevent1qqsrjjpzysyfdpdsvk3yfyt7yc653c2pa9a0q4as8a74dypq5qgk5hq2cr2a0'>nevent1q…r2a0</a><br/>_________________________<br/><br/>I know where the problem is, too, but I just don&#39;t want to get into it with the Freezegun people because suspect that the answer will be that the design of datetime left them with two almost equally unpalatable choices.<br/><br/>Also because to talk about it further, I would have to think about time zones. 2025-09-08T01:04:08Z https://yabu.me/nevent1qqsrjjpzysyfdpdsvk3yfyt7yc653c2pa9a0q4as8a74dypq5qgk5hqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h2658j5w9 Fucking time zones, how do they work? (1/2)<br/><br/>```<br/>from datetime import datetime<br/>from freezegun import freeze_time<br/><br/>fake_time = datetime.fromtimestamp(999999)<br/>with freeze_time(fake_time):<br/> assert datetime.now().timestamp() == 999999<br/>``` 2025-09-08T00:58:13Z https://yabu.me/nevent1qqsg6cgenq49nxe6mjspt84pnl7lspcg6w6lesa7mdruj9e0wnkndfszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26zfentl Suppose each of a polyhedron&#39;s faces is a non-convex polygon. What&#39;s the smallest number of faces it can have?<br/><br/><a href="https://math.stackexchange.com/q/5094422/25554">https://math.stackexchange.com/q/5094422/25554</a><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/163/619/033/939/462/original/7bc4a4bfe61e07a4.png"> <br/> 2025-09-07T15:03:55Z https://yabu.me/nevent1qqst76r75gya2emt7awtaftwk6805577efp59vhy53kdjv45cp5eqkszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26mlnynv <span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1xe9q0wt5juseg32ufqh7cem8t6qgjyymp30ts9aahgg6v5kc36rspsd8ze" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Niki</span> (<span class="italic">npub1xe9…d8ze</span>)</a></span> Hey, I installed Fira Code on my linux laptop and it looks great in VS Code. But when I tried to select it in GNOME Terminal, it looked like this. Do you know what might be wrong?<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/160/794/503/330/513/original/8cb2822e1b47e161.png"> <br/> 2025-09-07T03:05:04Z https://yabu.me/nevent1qqs9ed9zugckrqmmnsrhq2yfv3a5vaep6p6x5ue89d6dmzk7a937m0czyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26j4n8t9 #itsAlwaysPokeweed<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/159/353/224/578/096/original/8458271234195dec.jpg"> <br/> 2025-09-06T20:58:11Z https://yabu.me/nevent1qqsddqa36gfdfehp4yw03v4xq8r5y72gn95ts96w4dsd433kn3svj0gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26z9urju Pharmacies in Pennsylvania immediately resume COVID-19 vaccines after State Board of Pharmacy votes unanimously to allow pharmacies to rely on guidance from some medical professional societies rather than the CDC.<br/><br/>We&#39;re getting our shots later this afternoon.<br/><br/>#shareGoodNewsToo <br/><br/><a href="https://penncapital-star.com/government-politics/pa-board-of-pharmacy-votes-to-use-vaccine-guidelines-from-non-government-groups/">https://penncapital-star.com/government-politics/pa-board-of-pharmacy-votes-to-use-vaccine-guidelines-from-non-government-groups/</a> 2025-09-06T17:49:40Z https://yabu.me/nevent1qqst087hj3lspwh45wsdyd48vjazlkg4g0c9enzl5f22zu2rzcfzj9gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26pxd4cp Its POKEWEED SEASON!<br/><br/>#itsAlwaysPOKEWEED<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/152/634/265/992/854/original/7e7acc0aafbb3e51.jpg"> <br/> 2025-09-05T16:30:04Z https://yabu.me/nevent1qqs2e8p6da9f2zvcjqhyfk5czunt3cpzq25yslaan6nvjz996f4qpxqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h2682um6k In reply to <a href='/nevent1qqs03aywmywuu487y2dxwv4jm25vpndvyn4zt5pvc3m6y4q08vzha7cpppf4p'>nevent1q…pf4p</a><br/>_________________________<br/><br/>I realised a couple of weeks ago that I had a belief that when these horse chestnut burrs matured they looked like this:<br/><br/>Which makes absolutely no sense, and is false. These are sweetgum burrs.<br/><br/>I think I might have conceived this theory as a small child and then retained it into middle age.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/118/124/824/068/863/original/97d826b885a5b481.jpg"> <br/> 2025-08-30T14:13:35Z https://yabu.me/nevent1qqs03aywmywuu487y2dxwv4jm25vpndvyn4zt5pvc3m6y4q08vzha7czyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26v2x3v5 Autumn, right on schedule, maybe even a couple weeks early for a change.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/118/094/887/756/387/original/0437b78a1c894aa6.jpg"> <br/> 2025-08-30T14:06:37Z https://yabu.me/nevent1qqsxqkpvtjpg9x3n90x5d7scvtzj65utpvyeyua0s4hzxyj6mzjmmngzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26radx8x <img src="https://media.mathstodon.xyz/media_attachments/files/115/110/189/295/395/790/original/63ec72f41817d89e.png"> <br/> 2025-08-29T04:34:57Z https://yabu.me/nevent1qqsqfqquvmpx7du9rk92tpfhujadwgxcum099thgxm9ft58rcurtwmgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26h5elyt <img src="https://media.mathstodon.xyz/media_attachments/files/115/110/183/937/366/142/original/503e52f91b81f7bb.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/110/185/559/431/257/original/4781fd594a777c27.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/110/187/152/096/987/original/be1ae6657bea5f8f.png"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/110/187/855/180/791/original/94edd3c638508ae8.png"> <br/> 2025-08-29T04:34:37Z https://yabu.me/nevent1qqsv3sehn63x3tcmdvudtvxjys7nny8802qs5n8qqgk6hwuxdc552cgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h263w924a I think many people misunderstand the purpose of code review. The purpose of code review is not for the reviewer to find bugs, and certainly not for them to ensure that the code is bug-free. Anyone who depends on code review to find bugs is living in a fool&#39;s paradise. As everyone should know by now, it is not in general possible to find bugs by examining the code. <br/><br/>The primary purpose of code review is to find code that will be _hard to maintain_. The reviewer looks at the code and tries to understand what it is doing and how. If they can&#39;t, that means it will be hard to maintain in the future, and should be fixed now, while the original author is still familiar with it. 2025-08-26T19:29:37Z https://yabu.me/nevent1qqs9drhepkdspqrk28f7lf2y4mv7q0vqlc34sysqxd3z9f7j60zkhzszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26y5zgwx I&#39;ve been writing automated tests for decades now. And I still find myself saying things like “oh, this is trivial, I don&#39;t need to write a test for it” or “oh, this is just a wrapper around X, and the tests for X pass, I don&#39;t need to write a test for it” and then I write the tests anyway and they fail because my trivial wrapper had a bug.<br/><br/>Most recently: A web app where an HTTP endpoint, `delete-player-data` looks up the player&#39;s record and passes it to a `delete_related_records` function that deletes some records. The `delete_related_records` function is well-tested and works properly when passed a player record. The tests for the HTTP endpoint will be almost the same: set up the same fixture data, and do the same checks that the data is really gone after the request is sent to the endpoint. Do I really have to do this?<br/><br/>Friends, the endpoint was wrong and its tests failed. I had forgotten to have the endpoint commit the transaction after calling `delete_related_records` before returning, so the changes were rolled back.<br/><br/>I have trained myself pretty well that when I have these thoughts—which is pretty often—another part of my brain yells <br/><br/>JUST WRITE THE TESTS, FOOL. 2025-08-26T14:41:45Z https://yabu.me/nevent1qqsdqnyyvu7mprna3jtr397yqm2fhadsruamgyzn4nu734r2ptpusdszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26h4v7hg Aha! Wish I&#39;d thought of this before, it&#39;s the exact same idea but in a simpler version. It&#39;s the usual definition for an exponential object \( Z^Y\) in a category, except instead of considering arrows \( g&#39;: X\to Z^Y \) in general, we consider only the case \( X=1 \).<br/><br/>Easier to get my head around as a halfway step toward the full definition.<br/><br/>#categoryTheory<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/084/113/678/621/659/original/b95231ad48b48506.jpg"> <br/> 2025-08-24T14:03:53Z https://yabu.me/nevent1qqs0djtf29nvsxtplkejnnagz94yz0wp4jwlhgyuud2sjkyx9dd7jgszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26psqdvw Enjoy this artwork of _Hallucigenia_ being fitted for new socks. Last time, the sock lady tried to put the socks onto its dorsal spines. So embarrassing!<br/><br/><a href="https://en.wikipedia.org/wiki/Hallucigenia">https://en.wikipedia.org/wiki/Hallucigenia</a><br/><br/>Original source:<br/><br/><a href="https://www.pixiv.net/en/artworks/19114605">https://www.pixiv.net/en/artworks/19114605</a><br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/068/838/050/218/631/original/8fa3297efc0fee96.png"> <br/> 2025-08-21T21:21:42Z https://yabu.me/nevent1qqstjjusry88jmmrx74szhj8nrhu0c5zh06xjwpmfu2s2wv3wxht2yszyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26r2xhq3 NO RETROMINGENCY<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/068/794/939/428/719/original/6c62833bb1498602.jpg"> <br/> 2025-08-21T21:07:54Z https://yabu.me/nevent1qqs2y9e0tn0kfcaas9k7ddrpt52g2v6n74qdyf3ek0s25jejwxqkm0qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26f50zl9 <span itemprop="mentions" itemscope itemtype="https://schema.org/Person"><a itemprop="url" href="/npub1ye2w4e6jj8xmmlnfnqdqvc9x6x6av64d2v2ehvhkhptm9thcrhzqxqwm6h" class="bg-lavender dark:prose:text-neutral-50 dark:text-neutral-50 dark:bg-garnet px-1"><span>Neil Cicierega 🐜</span> (<span class="italic">npub1ye2…wm6h</span>)</a></span> I found this small tile mosaic out back of Christianne&#39;s Lyceum in Vancouver.<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/068/731/140/396/215/original/906450a69110654b.jpg"> <br/> 2025-08-21T20:52:25Z https://yabu.me/nevent1qqsdrnvu5t5t2ucwux5m2s84tw6sp5s472tmdrxjmeec4jvtvstw54gzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ar37r6 #TilingTuesday<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/056/767/450/617/982/original/6eeec2f28526a52c.jpg"> <br/> 2025-08-19T18:09:10Z https://yabu.me/nevent1qqspgesmj0f79ahg9340d80c8ru2z6grwr6g00yzm7xykydg6pq6dtqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h263w62dy #TilingTuesday <br/><br/>Two different kinds of dodecagons.<br/><br/>(One set is only kinda sorta dodecagons, but you can see what I mean.)<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/056/446/520/026/954/original/8e96d71c162ef59e.jpg"> <br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/056/446/652/054/957/original/9bd4d6679086fa59.jpg"> <br/> 2025-08-19T16:48:39Z https://yabu.me/nevent1qqstj4sg5wdv0e3q5lu7ga6a2yatykm53y54ej0ztmmhh5fwmd2n8qczyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26kjjfx9 In reply to <a href='/nevent1qqsdz9hk4q7h69yd0syz49xunq8n5r8cchyfxpdht2vac5snd02udyqq5pq0j'>nevent1q…pq0j</a><br/>_________________________<br/><br/>I tried a while back to get Claude to do some simple graph theory and was dismayed at how badly it did. It made many correct statements, but most were nonsequiturs.<br/><br/><a href="https://blog.plover.com/tech/gpt/graph-theory.html">https://blog.plover.com/tech/gpt/graph-theory.html</a><br/><br/>I&#39;ve had good results from Claude, but not for anything like this. I think it might have worked better to have asked it to write a program to search for the solution. 2025-08-19T03:48:31Z https://yabu.me/nevent1qqs2shu2z30a5h89e6s7v3ety29vv68xcwqtcdx9e5qsqp5ddc7cv6qzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26ctc8nx #mosstodon #lichenSubscribe<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/040/523/199/349/540/original/b0ad1f093f93bda8.jpg"> <br/> 2025-08-16T21:18:20Z https://yabu.me/nevent1qqsy39ka7yyc8g2qf09ktlu596kdmv4kjyky9spyn2awfvh9v2kmujqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h2650qe4a “Well, you see, the other two Brits died.”<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/115/039/607/885/961/412/original/043775e59f28afeb.jpg"> <br/> 2025-08-16T17:25:12Z https://yabu.me/nevent1qqs90r5ztcewfey04rsss8m48c4582sdae45pvfwf0enenu6jfvj6hgzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26q43ser In reply to <a href='/nevent1qqsp3jkug8s24vhqn6x6ywf6629h8662t6dk6lx4757gp9w9esdjw6s84vlx7'>nevent1q…vlx7</a><br/>_________________________<br/><br/>I wonder if they did check any of them. Wouldn&#39;t any lawyer, faced with the accusation that the fourth cite was bogus, automatically claim to have carefully checked the first three? 2025-08-15T11:39:54Z https://yabu.me/nevent1qqsqa4vk52c9kxwy2u2mewneuw6t34zld0qes2pr6gq38szfm56tslqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26k2c4x8 In reply to <a href='/nevent1qqszuv2nl3g8wwkfn5eyxefj4dynfrf3c8tdx4rg3k34v3a7xhedn2gkwsfa6'>nevent1q…sfa6</a><br/>_________________________<br/><br/>Have you read this amazing article? It&#39;s about the extremely poisonous rough-skinned newt, and the garter snakes that not only learned to eat it but how to concentrate the toxin in their livers, to make themselves less appealing to their own predators.<br/><br/><a href="https://crookedtimber.org/2025/06/05/occasional-paper-the-impossible-predicament-of-the-death-newts/">https://crookedtimber.org/2025/06/05/occasional-paper-the-impossible-predicament-of-the-death-newts/</a> 2025-08-15T08:58:26Z https://yabu.me/nevent1qqsz4thkgz02q0m6pxwf34ysh6rm2q0at82vsxa9q4ajqrzucc64hqqzyqfyj7ef3cm7nrws6ggsx4ukfksax2qkgcg2l99hpumu3evsx0h26c95j3e I spent a while yesterday reading about the history of gun barrel rifling. The difference between a rifle and a &#34;smoothbore&#34; gun like a shotgun or a musket it that the barrel has helical grooves that engage the bullet and impart a spin to it. The spin helps the bullet stay on a straight trajectory. (Conservation of angular momentum, yo.)<br/><br/>I was surprised to learn that it had been invented very early, around 1500! But it wasn&#39;t widely done because it was hard to do with the available tools. Also, The bullet and the barrel must be much more precisely sized—the bullet has to be big enough to engage the grooves, but not so big that it gets stuck. <br/><br/>And how do you get the bullet to engage the grooves? One common answer is: the bullet is made of soft lead, so the hot propellant behind it tends to make it expand! <br/><br/>I wondered: do gunmakers make barrels where the groove twist increases as the bullet moves along? It seems like that might cause less wear, if the bullet&#39;s rotation starts more gently and then comes up to speed. It turns out yes, sort of. Again it&#39;s not widely done because it&#39;s hard to do. But artisanal gunmakers know that it&#39;s hard to get the twist perfectly uniform along the length of the barrel, so they sometimes make and rifle the barrel, then measure the twist at both ends, and choose the end with more twist to be the muzzle end.<br/><br/><a href="https://en.wikipedia.org/wiki/Rifling">https://en.wikipedia.org/wiki/Rifling</a><br/><br/>Attached picture: 105mm tank gun barrel.<br/> <img src="https://commons.wikimedia.org/wiki/File:105mm_tank_gun_Rifling.jpg"> <br/>© John Doe / Wikimedia Commons / CC-BY-SA-3.0 / GFDL<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/114/982/593/738/196/112/original/c67b39f11851d3ab.png"> <br/> 2025-08-06T15:46:02Z