rnather @rnather@mathstodon.xyz

Da viele Gruppen jetzt Tools für Online-Treffen benötigen, haben wir einen Mumble- und einen Jitsi-Meet-Server aufgesetzt den ihr für eure Gruppen-Plena etc. frei verwenden könnt. Schreibt einfach eine Mail an online-plenum@schleuder.0x90.space um Zugang zu bekommen. #corona #coronasolidarität #coronahilfe

New entry!
ComputingLinkages
Article by Andries de Man
In collections: Easily explained, History, Things to make and do, Unusual computers
Analog calculating machines usually contain lots of gears (differentials), cams, ball-and-disc integrators and rack-and-pinions. But would it be possible to construct such calculating machines only using hinged rods? In the first instance, one would think only linear functions could be...
URL: https://sites.google.com/site/calculatinghistory/home/computing-linkages
Entry: https://read.somethingorotherwhatever.com/entry/ComputingLinkages

University presses that have made books and journals open access during the pandemic: https://www.publicbooks.org/public-books-database/

CW: Bad pun

Does the restless soul of a dead goose turn into a ghoost?

#pun #badjoke #badumts

The toddler has started using the words 'maybe' and 'probably'. Time to inoculate her against frequentist interpretation.

Mathematicians are like Frenchmen: whatever you say to them they translate into their own language and forthwith it is something entirely different. -- Johann Wolfgang von Goethe 1749-1842

RT @MathsEdIdeas@twitter.com

A little something that may help... 320 Random Acts of Maths: pocket-sized problems, teasers, curios, provocations, inspirations, etc. For downloads, inc. solutions and slides: http://bit.ly/2MkTnFM • #maths #math #MTBoS #iteachmath #mathsathome #MathsEveryoneCanAtHome

🐦🔗: https://twitter.com/MathsEdIdeas/status/1244940414156771328

I am much more likely to use your tool if it has CLI or can be integrated nicely with my existing workflow. Thanks!

A variant of the classic 15-puzzle, where the puzzle is coiled around a cylinder. Unlike the original, this version is solvable because of the extra connection between the first and sixteenth squares of the frame. YouTube: https://youtu.be/rfAEgxNEOrQ

What happens when half a cellular automaton runs Conway's Game of Life and the other half runs a rolling version of Rule 30 pushing chaos across the border? https://www.youtube.com/watch?v=IK7nBOLYzdE, via https://news.ycombinator.com/item?id=22723884

I wish I could see a larger scale of time and space to get an idea of how far the effects penetrate. If the boundary emitted gliders at a constant rate they'd collide far away in a form of ballistic annihilation but the boundary junk and glider-collision junk makes it more complicated.

LeVar Burton has been looking for stories to read on livestream but has also been worried about copyright violations so Neil Gaiman gave him blanket permission to read any of his stories and that's a nice thing tbh.

RT @dhh
WHO HAS TIME TO GO GET A BUCKET?! WE ARE TRYING TO EMPTY THE SHIP FROM WATER. JUST TAKE THIS SPOON!

[The internal logic of how ain’t nobody got time to write or read anything long form these days. All we can do is chat or video.]

Take action against #EarnIt: https://tutanota.com/blog/posts/earn-it-barr-encryption/ #Fight4Privacy #Fight4Encryption

Liven up lock-down: it's not social distancing, it's Covid Ops.

Sneak in and out of the park without being seen by another soul. Erase all trace of your activities with thorough hand-washing.

3 recent "Did you know?":

... that Chiara Daraio used Newton's cradle to create sound bullets, and ball bearing filled walls to create one-way sound barriers? https://en.wikipedia.org/wiki/Chiara_Daraio

... that a tetrahedron with integer edge lengths, face areas, and volume can be given integer coordinates?
https://en.wikipedia.org/wiki/Heronian_tetrahedron

... that former college basketball star Amy Langville is an expert in ranking systems, and has applied her ranking expertise to basketball bracketology?
https://en.wikipedia.org/wiki/Amy_Langville

Mund- und Datenschutz gehen zusammen.
Wir erweitern unser Angebot, mal schauen wie viele wir schaffen.

Hilft vermutlich in Zukunft auch vor Gesichtserkennung.

Hier gibt es die Nähanleitung:
https://media.essen.de/media/wwwessende/aemter/0115_1/pressereferat/Mund-Nasen-Schutz__Naehanleitung_2020_Feuerwehr_Essen.pdf

#mundschutz #mundnasenschutz #maske #gesichtserkennung

Albert #Uderzo left us today... "Astérix" was certainly the first comic I read and his generous curved drawing style had a big impact on my way to draw. Rest in peace.
https://en.wikipedia.org/wiki/Albert_Uderzo

Education isn't something you can finish -- Isaac Asimov

I hate it when I can't tell if there's some stray diacritic on a character or if my screen is just dirty. I've tried cleaning off so many à or ï off my screen and feel a bit silly every time.

My math-teaching brother's wish is that 2020 is the year everyone learns that "exponential" doesn't mean "very fast" it means "imperceptibly gradual and then suddenly overwhelming".