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Zu Chongzhi
Zu Chongzhi 祖沖之
(
pinyin
zhu3 chong1 zhi1) (
425
-
500
) was a
Chinese
mathematician
and
astronomer
during the
Song Dynasty
(of the
Southern Dynasties
). His achievements included the
Daming calendar[?]
introduced in
465
and deriving two approximations of
Pi
,
3.14156
and
22/7
.
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