Olry Terquem
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Olry Terquem (16 June 1782–1862) was a French mathematician, best known for his work in geometry, where he proved Feuerbach's theorem about the nine-point circle of a triangle. As one of the editors of the Nouvelles Annales, he published in 1842 the second analytical proof of the theorem, that the nine-point circle touches the incircle and the excircles of a triangle.
Terquem was among the first who recognized the importance of the work of Évariste Galois.
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