Most recent change of Lobachevsky

Edit made on September 03, 2009 by ColinWright at 11:44:21

Deleted text in red / Inserted text in green

WW
HEADERS_END
Lobachevsky (1792 - 1856) investigated
Non-Euclidean geometry and showed that Euclid's 5th
postulate is independent of the other four.

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See also:
* http://en.wikipedia.org/wiki/Nikolai_Lobachevsky
* http://www.gap-system.org/~history/Mathematicians/Lobachevsky.html