2026-04-06T06:19:48Z https://yabu.me Adam Coffman https://yabu.me/npub140stpn42fcq89jp68sfm5332kxlryqkqs2x4jd2w4yf7zweg4f4sjr9c79 https://media.mathstodon.xyz/accounts/avatars/109/292/804/265/200/186/original/13bf14d8ae27e828.jpg https://media.mathstodon.xyz/accounts/avatars/109/292/804/265/200/186/original/13bf14d8ae27e828.jpg https://yabu.me/nevent1qqsp8mk5rpzzmzdgqhje72kt5jpr5du9gfgdnjstx99sws37rzgl23qzyz47pvxw4f8qqukg8g7p8wjx92cmuvszczpg6kf4f6538cfm9z4xk85mkgu In reply to <a href='/nevent1qqs2rvampmfhn2vuuleveefdcgkw0l9kx9t5x2yfh2zxvaj9x0s3pfcyra2le'>nevent1q…a2le</a><br/>_________________________<br/><br/>The notion of a function being complex differentiable on an open set in \({\mathbb C}\) is pretty important in complex analysis. Not everyone is satisfied when the word &#34;analytic&#34; is defined to mean this. 2025-08-13T13:08:31Z https://yabu.me/nevent1qqs9f3mp3emu6u02x0cn6646mxtccl0hftxx9z3tvfutcq56fvz34aqzyz47pvxw4f8qqukg8g7p8wjx92cmuvszczpg6kf4f6538cfm9z4xk6fgzq7 my album with photos and videos of today&#39;s #NoKings event with thousands of attendees in #FortWayne #Indiana<br/><a href="https://www.flickr.com/photos/coffmanadam/albums/72177720326856736/">https://www.flickr.com/photos/coffmanadam/albums/72177720326856736/</a> 2025-06-14T21:27:55Z https://yabu.me/nevent1qqsgvgy7pyyeutzc2q7q5kw24cgdh9t378wjyzz3fpzwju0k42r9xkczyz47pvxw4f8qqukg8g7p8wjx92cmuvszczpg6kf4f6538cfm9z4xkn8mezl Pedro the #Math Cat 🐈 on a sunny spring day<br/>#cats #CatsOMastodon #Caturday<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/114/402/268/627/816/865/original/76225a354441867a.jpg"> <br/> 2025-04-26T04:03:35Z https://yabu.me/nevent1qqsth3ljndac46dzp24dn0dnj6yrp67rs7gzxn3xv52f64yj7hga2fqzyz47pvxw4f8qqukg8g7p8wjx92cmuvszczpg6kf4f6538cfm9z4xk6jh2m2 Usually arxiv.org&gt;math.CV has the most stultifyingly dull, surname-loaded, mildly-descriptive paper titles out of all the #math subjects (I am guilty of this myself). But today&#39;s list is (unintentionally?) bringing the holiday spirit.<br/>🕷️ 🕸️ 🧛 🦇 :monotile_spectre:<br/> <img src="https://media.mathstodon.xyz/media_attachments/files/113/390/975/186/566/309/original/15c7204d608f856b.jpg"> <br/> 2024-10-29T13:43:31Z https://yabu.me/nevent1qqsxt0fw9xznyf2qree3n6stvgsn0ysw8qclkcfqn7kq97cchmhen9czyz47pvxw4f8qqukg8g7p8wjx92cmuvszczpg6kf4f6538cfm9z4xkejnul2 In reply to <a href='/nevent1qqswt3639j8pax0ktlm4wcysgcr7n78a8l4evl2x7ks3drg6u46tncc54axsq'>nevent1q…axsq</a><br/>_________________________<br/><br/>Yes and yes. The second question is addressed in a series of exercises in Chapter 3 of Differential Topology by Guillemin and Pollack (using transversality with a goal of understanding the index). 2024-09-25T22:46:37Z