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Chronology of computation of pi

The table below is a brief chronology of computed numerical values of, or bounds on, the mathematical constant π. For more detailed explanations for some of these calculations, see Approximations of π.

Before 1400
} "He puts on (the circular site) four (bricks) running eastwards 1; two behind running crosswise (from south to north), and two (such) in front. Now the four which he puts on running eastwards are the body; and as to there being four of these, it is because this body (of ours) consists, of four parts 2. The two at the back then are the thighs; and the two in front the arms; and where the body is that (includes) the head." verses: 6.12.40-45 of the Bhishma Parva of the Mahabharata offer:"... The Moon is handed down by memory to be eleven thousand yojanas in diameter. Its peripheral circle happens to be thirty three thousand yojanas when calculated. ... The Sun is eight thousand yojanas and another two thousand yojanas in diameter. From that its peripheral circle comes to be equal to thirty thousand yojanas. ..." == 1400–1949 ==
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