Christian Lawson-Perfect @christianp@mathstodon.xyz

God may not play dice with the universe, but something strange is going on with the prime numbers -- Paul Erdös (1997)

Just learned about this handbook for making complex visual images such as charts, diagrams, mathematical graphs, and more. It's super helpful for anyone posting educational content online! Plus, it's #CC licensed. #a11y https://www.pcc.edu/instructional-support/wp-content/uploads/sites/17/2017/11/complex-images.pdf

https://sha-mbles.github.io/

> We have computed the very first chosen-prefix collision for SHA-1. In a nutshell, this means a complete and practical break of the SHA-1 hash function, with dangerous practical implications if you are still using this hash function. To put it in another way: all attacks that are practical on MD5 are now also practical on SHA-1. Check our paper here for more details.

When on eduroam do as the umm ... eduroamans do??

I did promise to tell about my BSc thesis topic one day. So get ready for a thread on... fractals! Along the way we'll also meet measure theory, a bit of function theory and several bad jokes.

I'll try to keep this as accessible as possible, even though I'll use some maths terminology. Feel free to ask if something is unclear! If the LaTeX equations do not render correctly for you, try opening the thread on https://mathstodon.xyz.

This is going to be a long thread, so let's get started!

@bremner Me, a Mathematica user for decades: Why yes, (#^%%)! & /@ %%% seems like a perfectly reasonable thing to write, why do you ask?

John Wallis and the Roof of the Sheldonian Theatre: https://www.soue.org.uk/souenews/issue4/wallis.html, via an @aperiodical description of a 3d print of the same structure, https://aperiodical.com/2019/11/my-adventures-in-3d-printing-wallis-sheldonian-theatre-roof/

It's an elegant way to build a wide roof out of short beams with no joinery. But the history is somewhat lacking: Similar structures were known much earlier to Leonardo Da Vinci, Villard de Honnecourt, and Sebastiano Serlio. See Sylvie Duvernoy, "An introduction to Leonardo's lattices", https://doi.org/10.1007/978-3-7643-8728-0_1

Elf (Nirvana Systems/Ocean Software, 1992) #DOSGaming