July 2011
61 posts
June 2011
161 posts
If you die suspiciously, the police check your...
ratherdielaughing:
Featured at Tumblr’s Funniest Posts
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...
