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jan 1, 470 - C: Tsu Ch'ung-chi's approx for pi

Description:

China: Tsu Ch’ung-chi’s approximation for pi as between 3.1415926 and 3.1415927, a record not surpassed for 800 years.

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History of Mathematics 2019

16 Jul 2019

2

0

1460

Date:

jan 1, 470

Now

~ 1557 years ago

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