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Paul Samuilovich Urysohn

Paul Samuilovich Urysohn was a Russian mathematician. He was born in 1898 and died in 1924. He is famous for developing Urysohn's Metrization Theorem and Urysohn's Lemma, both of which are fundamental results in topology.

External link:

MacTutor biography of Urysohn (http://turnbull.dcs.st-and.ac.uk/history/Mathematicians/Urysohn)

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