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...
Wonderful mathematical reading:
"Here you can find a variety of mathematical texts on many different topics. One section is related to the “snapshots of modern mathematics from Oberwolfach”, the other section offers general background material connected to our exhibits and projects. We hope you enjoy your read!"
Starting to think that @esoterica needs an opposite category to "Easily Explained" called "Unexpectedly Complicated"
Mathematician, koala fan, mathstodon.xyz admin,
⅓ of https://aperiodical.com. He/him
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