Mathematics in Ancient and Medieval India c7.s4.5

c7.s4.5

Halāyudha (10-11th century A.D.) in his commentary on the Piṅgala *Chandaḥsūtra*³ (ch. 8, verse 34) introduced a *meruprastāra* (pyramidal scheme) technique with the coefficients of the different variations in the expansion of (a+b)¹, (a+b)², (a+b)³………to minimise the trouble of computing the different layers which run thus :