Jyestadeva (1500-1610), was an astronomer of the Kerala school founded by Madhava of Sangamagrama and a student of Damodara. He is most known for writing the first calculus text, the Yuktibhasa . He also authored the Drk-karana on astronomical observations.

Based on that paragraph can we conclude that the sentence below is true?
Jyestadeva invented calculus.


 a). yes;
 b). no;
b).