C. S. Seshadri

Conjeevaram Srirangachari Seshadri FRS (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 a recipient of the Padma Bhushan in 2009, the third highest civilian honor in the country.
Degrees and posts.
He received his B.A. (Hons) degree in Mathematics from Madras University in 1953 and was mentored by Fr. Racine (born 1897 in France - died 1976 in India; Fr. means Father as he was a Jesuit priest, his first name was Charles) and S Naryanan there. He completed his PhD from Bombay University in 1958 under the supervision of K. S. Chandrasekharan. He was elected Fellow of the Indian Academy of Sciences in 1971.
He also served on the Mathematical Sciences jury for the Infosys Prize in 2010 and 2011. 
Seshadri worked in the School of Mathematics at TIFR in Bombay from 1953 to 1984 starting as a Research Scholar and rising to a senior professor. From 1984 to 1989, he worked in IMSc in Chennai. From 1989 to 2010, he worked as the founding director of the Chennai Mathematical Institute. He stepped down from his Directorship of the Chennai Mathematical Institute in December 2010, and continued to be a part of CMI as "Director-Emeritus" till his death in 2020.
Visiting professorships.
He has given talks at the ICM.
Research work.
Seshadri's main work was in algebraic geometry. His work with M S Narasimhan on unitary vector bundles and the Narasimhan–Seshadri theorem has influenced the field. His work on Geometric Invariant Theory and on Schubert varieties, in particular his introduction of standard monomial theory, is widely recognized. Seshadri's contributions include the creation of the Chennai Mathematical Institute, an institute for the study of mathematics in India.