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'''Virasena''' was an 8th century [[Indian mathematics|mathematician]] in [[India]] who 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|date=2000| contribution-url=http://books.google.co.uk/books?id=-xzljvnQ1vAC&pg=PA329&lpg=PA329&dq=Virasena+logarithm&source=bl&ots=BeVpLXxdRS&sig=_h6VUF3QzNxCocVgpilvefyvxlo&hl=en&ei=W0xUTLyPD4n-4AatvaGnBQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CBgQ6AEwATgK#v=onepage&q=Virasena%20logarithm&f=false}}</ref> |
'''Virasena''' was an 8th century [[Indian mathematics|mathematician]] in [[India]] who 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|date=2000| contribution-url=http://books.google.co.uk/books?id=-xzljvnQ1vAC&pg=PA329&lpg=PA329&dq=Virasena+logarithm&source=bl&ots=BeVpLXxdRS&sig=_h6VUF3QzNxCocVgpilvefyvxlo&hl=en&ei=W0xUTLyPD4n-4AatvaGnBQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CBgQ6AEwATgK#v=onepage&q=Virasena%20logarithm&f=false}}</ref> |
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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}}{{Citation |
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| last = Mishra |
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| first = V. |
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| author-link = |
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| last2 = Singh |
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| first2 = S. L. |
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| title = First Degree Indeterminate Analysis in Ancient India and its Application by Virasena |
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| journal = Indian Journal of History of Science |
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| volume = 32 |
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| issue = 2 |
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| pages = 127-133 |
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| date = February 1997 |
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| origyear = 1995 |
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| year = 1997 |
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| month = November}}</ref> |
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==References== |
==References== |
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Έκδοση από την 18:14, 4 Οκτωβρίου 2010
Πρότυπο:Unreferenced Virasena was an 8th century mathematician in India who 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).[1]
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 monotonically decreasing sequence approaching pi as a limit.[2]
References
- ↑ Gupta, R. C. (2000), «History of Mathematics in India», Students' Britannica India: Select essays, Popular Prakashan, σελ. 329, http://books.google.co.uk/books?id=-xzljvnQ1vAC&pg=PA329&lpg=PA329&dq=Virasena+logarithm&source=bl&ots=BeVpLXxdRS&sig=_h6VUF3QzNxCocVgpilvefyvxlo&hl=en&ei=W0xUTLyPD4n-4AatvaGnBQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CBgQ6AEwATgK#v=onepage&q=Virasena%20logarithm&f=false
- ↑ Mishra, V.; Singh, S. L. (February 1997), «First Degree Indeterminate Analysis in Ancient India and its Application by Virasena», Indian Journal of History of Science 32 (2): 127-133
See also
External links
- Singh, A. N., Lucknow University, http://www.jainworld.com/JWHindi/Books/shatkhandagama-4/02.htm Translation of part of the Dhavala.
Πρότυπο:Indian mathematics Πρότυπο:India-scientist-stub Πρότυπο:Asia-mathematician-stub