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| | Karl Menger - Wikipedia, the free encyclopedia |
 | | Karl Menger (born in Vienna, Austria, January 13, 1902 -- died in Highland Park, Illinois, USA, October 5, 1985) was a mathematician of great scope and depth. |
 | | He was the son of the famous economist Carl Menger. |
 | | With Arthur Cayley, Menger is considered one of the founders of distance geometry; especially by having formalized definitions to the notions of angle and of curvature in terms of directly measurable physical quantities, namely ratios of distance values. |
| en.wikipedia.org /wiki/Karl_Menger (193 words) |
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