Open post to fans of Indian mathamaticians

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Srinivasa Ramanujan (1887-1920), 

by unknown author - creofire.com (archived from the original), Public Domain, https://commons.wikimedia.org/w/index.php?curid=3911499

 

(Image: Brahmagupta - credit unknown)  

I'd like readers of this blog to suggest Indian mathematicians, in addition to Ramanujan and Brahmagupta, to be included in the list of the top ten Indian mathematicians of all time. Respond in the Comments.