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Cahit Arf, Turkish mathematician and academic (born 1910)

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Cahit Arf
Turkish mathematician (1910–1997)
Cahit Arf was a Turkish mathematician. He is known for the Arf invariant of a quadratic form in characteristic 2 in topology, the Hasse–Arf theorem in ramification theory, Arf semigroups and Arf rings.Source: Wikipedia (CC BY-SA)