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Born Mar. 18, 1796, in Utzenstorf; died Apr. 1, 1863, in Bern. Swiss geometer; one of the founders of projective geometry. Member of the Berlin Academy of Sciences (1834).
Steiner became a professor at the University of Berlin in 1835. He refined and systematized the use of projective methods to build complex geometric structures from simpler ones. Steiner was the author of Systematic Development of the Dependence of Geometric Forms on One Another (part 1, 1832) and The Geometric Constructions Executed by Means of the Straight Line and a Fixed Circle (1833; Russian translation, 1939).