I am sorry because I write the following in Japanese. Show more

Mathematical Objects: Stick of Chalk

A conversation about mathematics inspired by a stick of chalk. Presented by Katie Steckles and Peter Rowlett. Podcast: Play in new window | Download Subscribe: Android | Google Podcasts | RSS aperiodical.com/2019/04/mathem

Regular polygon surfaces: arxiv.org/abs/1804.05452
Ian Alevy answers Problem 72 of The Open Problems Project (cs.smith.edu/~jorourke/TOPP/P7): every topological sphere made of regular pentagons can be constructed by gluing regular dodecahedra together.

You can also glue dodecahedra to get higher-genus surfaces, as in this image from momath.org/mathmonday/the-para, but Alevy's theorem doesn't apply, so we don't know whether all higher-genus regular-pentagon surfaces are formed that way.

Another one of my domain coloring stuff from my archives: an iterated rational function with icosahedral symmetry, plotted over the Riemann sphere

Mathematical sign language: aperiodical.com/2019/04/mathem

Hearing-impaired eletrical engineering researcher Jess Boland discovered that weren't enough technical terms in British Sign Language to cover the mathematics she uses in her work, so she's been creating new ones as well as promoting the ones BSL already had. Katie Steckles interviews her for The Aperiodical.

(@aperiodical has a Mathstodon account but they're letting it go stale instead of promoting their new posts...)

We've blogged about #Halcyon 2.3.0,what we did especially in this release and also a few things before.You can read it here: nikisoft.myblog.de/nikisoft/ar
Additionally new strings of Halcyon 2.3.0 are now ready for translation at translate.zanata.org/iteration .We need your help for offering Halcyon in even more languages and to update existing languages.Thank you very much for your help!

Now I make PDF shinshu.us/itou.pdf , Thanks! We will plan to generalize Twitter "じゃがりきんａｐｕ長ピーポ黄金角形" twitter.com/wasanp_/status/109 in the future.

I've just updated mathstodon.xyz to Mastodon v2.8.0.
Release notes: github.com/tootsuite/mastodon/
It's got polls, an interface to manage your follow lists, and lets us change signups from open access to "ask for an invitation". We'll do that if spam becomes a problem again (it currently isn't)

・タイムラインのトゥート間の隙間を調整（各ブラウザの差異を埋めるべく）
・ブースト機能の拡張（設定画面で切り替えが必要です）
・Pleromaにようやく対応
などなど、詰め込みすぎた感がありますが詳細は下記をご覧ください。
github.com/nishlumi/gplusdon/r

#quesdon 本家の未回答質問をQuesdon(toot.app)にインポートできるようになりました。

quesdon.toot.app

What we'll see when Andromeda and the Milky Way collide! twitter.com/universal_sci/stat
#newsbot

A Mastodon instance for maths people. The kind of people who make $\pi z^2 \times a$ jokes.
Use $ and $ for inline LaTeX, and $ and $ for display mode.