Mathematics in Ancient and Medieval India c4.s4.t9.1

c4.s4.t9.1

The *Karaṇapaddhati* is an important astronomical work in ten chapters by an unknown Kerala astronomer of uncertain date. Only this much is known about the author that he was a Brāhmin who took his abode in the village Śivapura.¹ The text in Devanāgarī script is published by K. Sambaśiva Śāstrī², but this edition misses the opening verse.³ Apart from the usual elements and formulae characteristic of Hindu astronomy, the work gives in the sixth chapter, trigonometrical π, *sine cosine* and *tan* series. The mathematical importance of not only *Karaṇapaddhati* but three other texts namely *Tantrasaṃgraha*, *Yuktibhāṣā* and *Sadratnamālā* was first pointed out by C.M. Whish⁴ who discussed π and tan functions given in the texts and attempted to fix their dates.