Cahit Arf

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Science and technology

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What Wikipedia says

Cahit Arf (Turkish: [dʒaːhit aɾf]; 24 October 1910 – 26 December 1997) was a Turkish mathematician. He is known for the Arf invariant of a quadratic form in characteristic 2 (applied in knot theory and surgery theory) in topology, the Hasse–Arf theorem in ramification theory, Arf semigroups and Arf rings.

Excerpt from the Wikipedia article “Cahit Arf”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Türkische Zentralbank, Public domain, via Wikimedia Commons.