Christian Lawson-Perfect @christianp@mathstodon.xyz

I watched this nice talk about documenting code, yesterday: https://peertube.social/videos/watch/8f27a614-aa63-4811-af6a-b9e11effc399

reading Latin like, "superbum? more like super bum amirite"

Dank problems for edgy sets.

Choose a random graph with countably infinite vertices by flipping a coin to decide whether to include each edge. Or, construct a graph with binary numbers as vertices, with an edge \(x\)—\(y\) when \(x<y\) and the \(x\)th bit of \(y\) is one. Or, construct a graph on primes congruent to 1 mod 4, with an edge when one is a quadratic residue mod the other. They're all the same graph, the Rado graph (https://en.wikipedia.org/wiki/Rado_graph)! It has many other amazing properties. Now a Good Article on Wikipedia.

I wrote a bit about a bisection of a triangle's area which, when I read it, made me lower the book and call it a rotten liar. (It wasn't lying.) The thing might be old hat to you, but it startled *me*.

https://nebusresearch.wordpress.com/2019/02/12/in-which-i-am-disturbed-by-a-triangle-theorem-that-isnt-morleys-somehow/

(I have a follow-up post to it scheduled to post later today.)

Laser mapping!!!
https://www.instagram.com/p/Bt3c_5ani1K/

Learning fixed points and stability might be the happiest moment of this course.
Soon everything’s going to chaos. Literally, chaos.

normal women: women who are perpendicular to the floor plane

natural women: women who are a non-negative integer

regular women: women who are equiangular and equilateral

real women: women contained within the complete ordered field

They don't have any ball and they argue about some conjecture.

That's not even a joke, I saw it just 5 minutes ago. 🤣

machu picchu is now wheelchair accessible, so i think we can safely say that places which are not disability compliant don't really have an excuse anymore for that

The 2019 Bridges mathematical art gallery is online! http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings

Lots of good stuff in there...in https://twitter.com/bit_player/status/1086463227154915329, Brian Hayes lists his favorites as being the warped notepaper of Matt Enlow (http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings/unsolvedmre) and the Penrose quilt of Douglas G. Burkholder (http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings/burkholderd)

I am Dmitrii (Dima) Pasechnik a mathematician and a computer scientist, working full-time (funded by a Horizon 2020 EU project) on developing/maintaining a computer algebra system SageMath (http://sagemath.org). It is basically a huge Python library pulling in components developed in C/C++/Fortran/Cython/Common Lisp/... (and few obscure domain-specific "maths" languages). And even a literal SageMath programming LaTeX package :-)
(Today I mostly wrote/debugged m4 macros :-( )
#introduction