ToucanIan

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2026-01-07 16:53:48 UTC

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@nprofile…xuzd yes besides being heavy handed I just hate the way it dates the text. This is probably(?) my only complaint about dune messiah.

2025-12-30 17:17:20 UTC

This is very nice http://www.paultaylor.eu/ordinals/oldnew.pdf

2025-12-17 21:52:37 UTC

Thoroughly enjoying the talks so far at @nprofile…w8t5 60th birthday celebration! Happy (late) birthday Martin!

2025-12-05 23:06:53 UTC

The realization that your talk sucks

2025-12-04 01:30:12 UTC

What apps do people use for handwritten slides?

2025-11-19 00:40:10 UTC

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@nprofile…w8t5 the first paper is really nice! Can’t wait to check out the rest.

2025-11-18 09:38:02 UTC

Are there any critical results of computability thoery that don’t hold constructively? I’ve been privately keeping track throughout the semester. So far “proofs by contradiction” where just proofs of negation and uses of LEM happened when the propositions where decidable. But I’ve just seen a proof of rices theorem which relies on the intuitionistically invalid version of constrapositive.

2025-11-17 20:00:00 UTC

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@nprofile…rrqe can you link some examples

2025-11-15 12:08:19 UTC

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@nprofile…rrqe wouldn’t you just need is-prop(P) to identify two witnesses of P?

2025-11-14 04:50:12 UTC

It must actually be really psychologically troubling to have your ego so deeply attached to one of your ideas.

2025-11-10 20:29:08 UTC

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@nprofile…rrqe looking forward to reading it

2025-11-05 16:59:09 UTC

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@nprofile…ral2 also kills me. But one thing I remind myself is negation is primitive classically. So along with not being aware of many of the subtleties of logic they don’t care about.. many people don’t even know that not A is logically equivalent to A -> false.

2025-11-01 19:40:37 UTC

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@nprofile…w8t5 yes it is a proposition, but unlike mere existence defined in terms of prop truncation you actually have the element in hand (even if you try to define it more naively in terms of truncations). At first, this seemed strange to me. Then it didn’t. And I’ve continued to go back and forth.

2025-11-01 18:58:48 UTC

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@nprofile…w8t5 I’ve been thinking about unique existence a bit recently. I find it strange that it cannot be made anonymous (or unspecified). Does this make obvious sense to you? If so could you give me some insight?

2025-11-01 17:03:05 UTC

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@nprofile…rrqe should f and /eta be the same function? If not what is /eta?

2025-10-30 16:57:48 UTC

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@nprofile…rrqe the generalized algebraic theory write up is pretty nice, tbf!

2025-10-20 17:20:55 UTC

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@nprofile…w8t5 too big to fail with a twist

2025-10-16 21:18:35 UTC

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@nprofile…rrqe I remember when Egbert did it there constantly someone in the chat asking about there pre-calculus homework.

2025-10-16 16:13:58 UTC

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@nprofile…rrqe I’m interested in taking this class

2025-10-16 12:33:58 UTC

The nLab says prop resizing can’t hold in a theory with canonicity. But that seems not right. I am vaguely aware of a weird thing you could do to break normalization.

2025-08-20 03:45:35 UTC

How are people so good at finding counterexamples…? Gotta be one of my biggest blind spots.

2025-08-19 18:23:07 UTC

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@nprofile…v2av is there no difference between assuming a natural numbers object and more inductive objects?

2025-08-18 20:53:21 UTC

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@nprofile…hszg how likely is it that no one has done any interesting research in this area

2025-08-18 20:28:54 UTC

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@nprofile…hszg sorry :)

2025-08-18 19:48:12 UTC

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@nprofile…hszg
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2025-07-11 17:08:10 UTC

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@nprofile…6kk0 btw I would agree. I wish I learned about structural induction in my discrete maths course.

2025-07-11 16:07:31 UTC

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@nprofile…6kk0 upon browsing your teaching page I find that you include a lot of thing within the realm of discrete mathematics I would expect. Can you enlighten me with a broad definition?

2025-07-05 20:00:48 UTC

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@nprofile…6kk0 @nprofile…hszg making a distinction between vertical and horizontal lines helped my partner finally see the circles.

2025-07-04 22:15:55 UTC

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@nprofile…6kk0 I’ll check it out

2025-07-04 20:22:26 UTC

At some point mastadon should mimic (maybe improve) the quoting feature of twitter. Namely, when you link a post on mastadon users should be able to view the post while staying in app. I notice this mainly because I am a mobile user. Anyone else been frustrated by this?

2025-06-23 19:49:08 UTC

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@nprofile…6kk0 @nprofile…hszg wish more people did this (assuming you also assure them no negative repercussions for being out sick).

2025-04-08 10:38:56 UTC

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@nprofile…6kk0 I use emacs for no particular reason 😎