Two Motivated Concrete Proofs (much better than the usual one) that the Square-Root of 2 is Irrational
arXiv:1410.2304
Abstract
This short "education note" was inspired by Zvi Artstein's masterpiece Mathematics and the Real World, the Remarkable Role of Evolution in the Making of Mathematics (p. 53, and p. 400)
5 pages. Exclusively published in the Personal Journal of Shalosh B. Ekahd and this arxiv