.. title: Irrationality of √2 .. slug: irrationality-of-a2 .. date: 2014-05-31 12:10:13 .. tags: mathematics, history, irrational-numbers, pythagoras .. description: A brief exploration of the history behind the discovery of the irrationality of √2. .. categories: math, history .. wp-status: publish Came across this [interesting piece of Maths History](http://www.cut-the-knot.org/proofs/MorenoSqRt3.shtml). The discovery of the irrationality of √2 is sometimes credited to Hippasus of Metapontum (5th century BC), a Greek Pythagorean philosopher who was finally drowned at sea as a punishment from his peers, the Pythagoreans, for divulging the existence of the irrational numbers (the Pythagoreans advocate the idea that all numbers SHOULD be the ratio of two integers).