{{Short description|11th-century Indian mathematician}} {{Use dmy dates|date=July 2019}} '''Jayadeva''' (c. 1000 CE) was an Indian mathematician, who further developed the cyclic method (Chakravala method)<ref name="SG">{{cite book |title=Toward a Global Science: Mining Civilizational Knowledge |last=Goonatilake |first=Susantha |year=1998 |publisher=Indiana University Press |location=Indiana |isbn=0-253-33388-1 |pages=[https://archive.org/details/towardglobalscie0000goon/page/127 127, 128] |url=https://archive.org/details/towardglobalscie0000goon/page/127 }}</ref> that was called by Hermann Hankel "the finest thing achieved in the theory of numbers before Lagrange (18th century)".<ref>{{cite book |editor=Helaine Selin |editor-link=Helaine Selin |title=Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures |volume=1 |year=2008 |publisher=Springer |url=https://books.google.com/books?id=kt9DIY1g9HYC&pg=RA1-PA200 |page=200 }}</ref> He also made significant contributions to combinatorics.<ref>{{cite book |editor1=B. V. Subbarayappa |editor2=S. R. N. Murthy |title=Scientific Heritage of India |year=1988 |publisher=Mythic Society |url=https://books.google.com/books?id=bq4yAAAAIAAJ |page=59 }}</ref>
Jayadeva's works are lost, and he is known only from a 20-verse quotation in Udaya-divakara ''Sundari'' (c. 1073), a commentary on Bhaskara I's ''Laghu-bhaskariya''. This means that Jayadeva must have lived sometime before 1073,<ref name="KVS">{{cite encyclopedia |author=K. V. Sarma |author-link=K. V. Sarma |title=Jayadeva |editor=Helaine Selin |encyclopedia=Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures |volume=1 |edition=2nd |year=2008 |publisher=Springer |url=https://books.google.com/books?id=kt9DIY1g9HYC&pg=RA1-PA200 |isbn=978-1-4020-4559-2 |page=1153 }}</ref> possibly around 1000 CE.<ref name="SG"/>
==See also== *List of Indian mathematicians
==References== {{reflist}}
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{{DEFAULTSORT:Jayadeva}} Category:11th-century Indian mathematicians
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