Hallo, new Mastodon users! Here on mathstodon.xyz we've got a couple of mathematical emoji: and . I'd love to add some more. If you can make a PNG image the same size as those, send it to me and I'll add it. Faces of famous mathematicians are an easy place to start; could we have some shapes, polyhedra, or other mathographics too?
@christianp I'm not sure of the precise meaning, but one cannot fail to notice that it is an anagram of "Oil Suit Technocrat," which is probably a significant clue.
4. THE BEANFEAST PUZZLE. A number of men went out together on a bean-feast. There were four parties invited--namely, 25 cobblers, 20 tailors, 18 hatters, and 12 glovers. They spent altogether £6, 13s. It was found that five cobblers spent as much as four tailors; that twelve tailors spent as much as nine hatters; and that six hatters spent as much as eight glovers. The puzzle is to find out how much each of the four parties spent.
Here's an amusing if minor repeated typo in the literature: "appiled superconductivity", https://scholar.google.com/scholar?q=%22Appiled+Superconductivity%22 (177 hits). I think the source is IEEE, which spells Trans. on Applied Superconductivity correctly on its site but misspells it repeatedly in the doi database. So if you get your citations from doi metadata, you will get this error.
You can see the metadata for a doi by doing curl -LH "Accept: application/x-bibtex" on the url for the doi. Try e.g. 10.1109/TASC.2005.849553
Corker of a line from https://www.stephendiehl.com/posts/exotic01.html
“And the story of computation has been about the evolution of this very novel and peculiar form of human expression we call code. I suspect being a programmer in the 21st century must be like what being a royal scribe was like in Ancient Egypt in 3200 BCE. There’s this new modality of communication that most of the population is unaware of, yet it’s existence simultaneously enables commerce, culture and civilization to flourish.”
Here's what it means:
I have a process that begins by picking a number N, and totting up a total T that begins at 0.
Repeatedly do this:
* add N to T
* if N divides T, add 1 to N, otherwise subtract 1
* if N is 1, stop
I searched for N where the process stops
Origami Fibonacci torus and knotted torus: https://www.youtube.com/watch?v=LdnvxN4UUfs
I have the impression that the Fibonacci part just gives it a nice organic look (visible in much of Akio Hizume's other architecture at http://www.starcage.org/englishindex.html) but what interests me is the way it rotates smoothly. That's not something unfolded paper can do, because the inner parts of a torus have negative curvature, the outer parts are positive, and unfolded paper can't change curvature.
Questions invited ... answers are either on the website and I can point you to them, or not on the site and need to be added.
Gergonne's Card Trick, Positional Notation, and Radix Sort
Article by Ethan D. Bolker
In collections: Easily explained, Fun maths facts
Gergonne's three pile card trick has been a favorite of mathematicians for nearly two centuries. This new exposition uses the radix sorting algorithm well known to computer scientists to explain why the trick works, and to explore generalizations. The presentation...
Mathematician, koala fan, mathstodon.xyz admin,
⅓ of https://aperiodical.com. He/him
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