Tsu Ch'ung-Chih (Zu Chongzhi)
429-500
Chinese mathematician and astronomer who developed a remarkably accurate calculation of π. Tsu's figure of 355/113 or 3.1415926 is correct to six decimal places, and remained the most reliable approximation for many centuries. He wrote a mathematical text, now lost, with his son, and in 463 created a calendar that was never used.
This is the complete article, containing 56 words
(approx. 1 page at 300 words per page).
