|Jingshuo (courtesy name)|
Zu Geng or Zu Gengzhi (Chinese: 祖暅之; Wade–Giles: Tsu Keng-chih; ca. 480 – ca. 525) was a Chinese mathematician, politician, and writer. His courtesy name was Jingshuo (景爍). He was the son of the famous mathematician Zu Chongzhi. He is known principally for deriving and proving the formula for the volume of a sphere. He additionally measured the angular distance between Polaris and the celestial north pole.
- O'Connor, John J.; Robertson, Edmund F., "Zu Gengzhi", MacTutor History of Mathematics archive, University of St Andrews.
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