Viewing profile — cion

It might be Paul Halmos. In his "automathobiography", titled I Want to Be a Mathematician (Springer 1985), page 156: "In the late 1940's I began to act on one of my beliefs: to sta…

I wasn't familiar with this painting, for the very good reason that it doesn't exist Are you sure? The wikipedia page on Flaubert's novel says: "In 1845, at age 24, Flaubert visite…

This is the second volume in a three-volume series. The first one, on linear algebra, was mentioned here ( https://news.ycombinator.com/item?id=37935616 ). There is a repository wi…

But somebody has to write those Stackoverflow answers. Perhaps for those who do the distinction between man pages and info is important. Or do you think that the source of Stackove…

It's not pointless, but the outline only shows up if the generated tex file is compiled twice. The default org to latex export will only compile it once. Alternatively, it is easy …

I don't understand the reference to Gödel. Do you mean the theorem that in every formal system capable of representing arithmetic there exist sentences "P" such that neither "P" no…

Oh, sorry, didn't realize that. It still doesn't work, though, as the example of 2 * 3 * 5 * 7 * 11 * 13 + 1 = 59 * 509 shows.

You don't always get a prime. For example, 4! = 2 * 3 * 4 = 24, 24 + 1 = 25, 25 is not prime. The point is that N! + 1 is not divisible by any number from 2 to N (always leaves a r…