C. S. Seshadri

Conjeevaram Srirangachari Seshadri (29 February 1932 – 17 July 2020) was an Indian mathematician. He was the founder and director-emeritus of the Chennai Mathematical Institute, and is known for his work in algebraic geometry. The Seshadri constant is named after him. He was also known for his collaboration with mathematician M. S. Narasimhan, for their proof of the Narasimhan–Seshadri theorem which proved the necessary conditions for stable vector bundles on a Riemann surface.He also introduced and named the concept called Standard monomial theory.

He was a recipient of the Padma Bhushan in 2009, the third highest civilian honor in the country. Provided by Wikipedia