Halayudha

{{short description|10th-century Indian mathematician}}

{{Use dmy dates|date=March 2017}}

{{Use Indian English|date=March 2017}}

{{Infobox scholar

| name = Halāyudha

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| birth_date = c. 10th century AD

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| main_interests = Sanskrit mathematician

| notable_ideas =

| major_works = Mṛtasañjīvanī and "Halāyudha trikoņa"

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Halāyudha (Sanskrit: हलायुध) wrote the {{IAST|Mṛtasañjīvanī}}, a commentary on Pingala's Chandaḥśāstra, was an Indian Mathematician and poet who lived and worked in the 10th century.Maurice Winternitz, History of Indian Literature, Vol. III The Chandaḥśāstra by the Indian lyricist Piṅgala (3rd or 2nd century BC) somewhat crypically describes a method of arranging two types of syllables to form metres of various lengths and counting them; as interpreted and elaborated by Halāyudha his "method of pyramidal expansion" (meru-prastāra) for counting metres is equivalent to Pascal's triangle.{{Cite book |title=Gaṇitānanda: Selected Works of Radha Charan Gupta on History of Mathematics |last=Ramasubramanian |first=K |date=2019-11-08 |publisher=Springer |year=2019 |isbn=9789811312298}} {{Cite book |title=A Primer for Mathematics Competitions |last=Gavin Hitchcock |first=Alexander Zawaira |date=2008-10-31 |publisher=Oxford University |year=2008 |isbn=9780191561702}}