Editing Halayudha (section)

{{short description|10th-century Indian mathematician}}
{{Use dmy dates|date=March 2017}}
{{Use Indian English|date=March 2017}}
{{Infobox scholar
| name             = Halāyudha 
| fullname         =
| birth_date       = c. 10th century AD
| birth_place      =
| death_date       =
| death_place      =
| main_interests   = [[Sanskrit]] [[mathematician]]
| notable_ideas    =
| major_works      = ''Mṛtasañjīvanī'' and "Halāyudha trikoņa"
| influences       =
| influenced       =
}}

'''Halāyudha''' ([[Sanskrit]]: हलायुध) wrote the '''''{{IAST|Mṛtasañjīvanī}}''''', a [[close reading|commentary]] on [[Pingala]]'s ''Chandaḥśāstra'', was an Indian Mathematician and poet who lived and worked in the 10th century.<ref>Maurice Winternitz, ''History of Indian Literature'', Vol. III</ref> 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 [[metre (poetry)|metre]]s 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]].<ref>{{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}}</ref><ref>{{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}}</ref>