Βιρασένα: Διαφορά μεταξύ των αναθεωρήσεων
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Clarify Virasena's approximation to pi |
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Virasena was a noted mathematician. He gave the derivation of the [[volume]] of a [[frustum]] by a sort of infinite procedure. He worked with the concept of ''ardhaccheda'': the number of times a number could be divided by 2; effectively logarithms to base 2. He also worked with logarithms in base 3 (trakacheda) and base 4 (caturthacheda).<ref>{{citation| contribution=History of Mathematics in India|title=Students' Britannica India: Select essays|
Virasena gave the approximate formula ''C'' = 3''d'' + (16''d''+16)/113 to relate the circumference of a circle, ''C'', to its diameter, ''d''. For large values of ''d'', this gives the approximation π ≈ 355/113 = 3.14159292..., which is more accurate than the approximation π ≈ 3.1416 given by [[Aryabhata]] in the ''[[Aryabhatiya]]''.<ref>{{Citation
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