Βιρασένα: Διαφορά μεταξύ των αναθεωρήσεων
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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|editor-first1=Dale|editor-last1=Hoiberg|editor-first2=Indu|editor-last2=Ramchandani|first=R. C.|last=Gupta|page=329|publisher=Popular Prakashan|
He was also the first person to give a value of [[pi]] more accurate than provided by any of his predecessors by means of constructing a [[monotonic function|monotonically decreasing]] sequence approaching pi as a [[limit (mathematics)|limit]].<ref>{{Citation
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| volume = 32
| issue = 2
| pages =
| date = February 1997
| origyear = 1995
| month = November}}</ref>
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