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kickstarter, math circle book 

@christianp Nice. I wish there were a way to do the same at arXiv, but things are a bit too dense there.

What I use most often at arXiv does work at MathWorld though: mathworld.wolfram.com/search/?

Just noticed that the LaTeX → unicode replacement on mathstodon.xyz wasn't there - it was on the mathjax-only feature branch!
Now turned back on. Enjoy ∀!

Is anyone planning anything for the next palindrome day, 2020-02-02?

it looks like it's just ignoring large parts of my query. "derivative of {x,x^2}" produces the same result: wolframalpha.com/input/?i=deri+
I still can't see how you get from {x,x^2} to x^3+x^2.

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john venn: ok now fellas, i know you all hate me for my obsession with making diagrams, and also for my obsession with set theory, but which of you hate me for both? observe,

The phishing is coming from _inside_ the social network!

This from the "bet you can't kick yourself in the nuts" school of psychology

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 pcc.edu/instructional-support/

Trying to have a conversation with a colleague, but all I can think about is how comfy this new jumper is.

Food 

mathstodon.xyz users: I've found out why LaTeX sometimes isn't rendered: it's a bug in MathJax! See github.com/mathjax/MathJax-src for the details.
For now, I think you can avoid it by not putting a math delimiter at the start of a line. Even a single space should be enough to avoid the bug.

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.

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