"Strong words outlast the paper they are written upon." - Joseph Bruchac

September 24, 2017 2:00 PM

dCode is a French and English site that is hundreds of en/decoding, de/cyphering, and other mathematical and puzzle making/ solving tools, from Alberti cipher (Wikipedia) and Navajo code (Wiki), to inverse of a matrix and Knuth's arrows (Wiki).
posted by filthy light thief (5 comments total)

I went to a graph theory talk a couple of years ago, and everything was going along swimmingly until the speaker started discussing the size of the graphs that were being guaranteed to have whatever the property was. And then the speaker started busting out Knuth's arrow notation...

Cracked me up. The moral of the story is...infinity is really big. No, bigger. No, still bigger than that. The distance between finite and intelligible...it's big too. (Yes, I know that infinity is not a number. )
posted by leahwrenn at 3:15 PM on September 24, 2017 [1 favorite]

the speaker started discussing the size of the graphs that were being guaranteed to have whatever the property was. And then the speaker started busting out Knuth's arrow notation...

"...which definitely gives us an upper bound. This is probably not sharp, however, as the best currently-known lower bound is 13."
posted by Wolfdog at 5:46 PM on September 24, 2017 [2 favorites]

Is there an English version? Or just bits and pieces in English?
posted by anshuman at 6:39 PM on September 24, 2017

I didn't see a way to toggle to English on the main page, but subsequent pages have FR and UK/US flags on the top right of the pages (on PC/desktop view, at least), which seem to set the language for the entire site, but there are some French words that pop up here and there.
posted by filthy light thief at 10:26 PM on September 24, 2017

https://gchq.github.io/CyberChef/ is also a super cool tool for this kind of job.
posted by xiw at 1:49 PM on September 25, 2017