Chongzhi was a Chinese mathematician and astronomer.He made numerous accurate computations including computing pi to six decimal places, a feat not exceeded for a thousand years, he calculated a year to 365.242 days, and a Jupiter year as 11.858 earth years, both very close to the actual figures.
Stamp | Description |
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China, 8f, 1955 Scott: 246 A57 |
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Hong Kong, China, 2.90, 2015 Scott: |
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Guinea, 6500fg, 2009 |