Chao Ko
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Chao Ko (柯召, pinyin: kē zhào, April 12, 1910 - November 8, 2002) was a mathematician born in Taizhou, Zhejiang, China.
He graduated from Tsinghua University in 1933 and obtained his doctorate from Manchester University under Louis Mordell in 1937. His main fields of study were algebra, number theory and combinatorics. Some of his major contributions included his work on quadratic forms, the Erdős-Ko-Rado theorem and his breakthrough on Catalan's conjecture. He was later a professor at Sichuan University.
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