If you die suspiciously, the police check your...
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Yang Hui's triangle
rafael-wawer: Jia Xian’s triangle, by Jia Xian (1010-1070), better know as Yang Hui’s triangle, by Yang Hui (1238-1298). “Jia Xian invented the Jia Xian triangle around the first half of the 11th century, about six centuries before Pascal. Jia Xian used it as a tool for extracting square and cubic roots.” Pascal’s triangle, 1653, by Blaise Pascal (1623-1662). “Each number in the triangle...