- Hippasus
Hippasus of Metapontum ( _el. Ίππασος), b. c.
500 B.C. inMagna Graecia , was a Greekphilosopher . He was a disciple ofPythagoras . To Hippasus (or Hippasos) is attributed the discovery of the existence ofirrational numbers . More specifically, he is credited with the discovery that thesquare root of 2 is irrational.Until Hippasus' discovery, the Pythagoreans preached that all numbers could be expressed as the ratio of integers. Despite the validity of his discovery, the Pythagoreans initially treated it as a kind of religious heresy and they either exiled or murdered Hippasus. Legend has it that the discovery was made at sea and that Hippasus' fellow Pythagoreans threw him overboard.
But there are two other stories about Hippasus. The first says that Hippasus was expelled from the Pythagorean school because he published doctrines of Pythagoras, while the second says that he was drowned at sea for revealing the construction of the
dodecahedron in the sphere and claiming it as his own. But since the Pythagoreans' supposed pledge to secrecy was most likely false Fact|date=May 2008, the authenticity of these stories is questioned.He was also noted as an early experimenter in
acoustics andresonance . Few of his original works now survive.References
*
Simon Singh (1997) "Fermat's Last Theorem", p. 54 ISBN 1-85702-521-0ee also
*
Incommensurable magnitudes External links
* [http://scienceworld.wolfram.com/biography/Hippasus.html Hippasus of Metapontum]
Wikimedia Foundation. 2010.
