C. S. Seshadri

{{About|the Indian mathematician|the Indian civil servant|Chikmagalur Seetaramiah Seshadri}}

{{Infobox scientist

| name = C.S. Seshadri

| image = SeshadriinBengaluru2010 182.JPG

| image_size =

| caption = Seshadri in 2010.

| birth_name = Conjeevaram Srirangachari Seshadri

| birth_date = {{birth date|1932|2|29|df=y}}

| birth_place =

| death_date = {{death date and age|2020|07|17|1932|02|29|df=yes}}

| death_place = Chennai, India

| field = Mathematics

| work_institution = Chennai Mathematical Institute

| alma_mater =

| doctoral_advisor = K. S. Chandrasekharan

| doctoral_students = Vikraman Balaji, V. Lakshmibai

| known_for = Seshadri constant
Narasimhan–Seshadri theorem
Standard monomial theory

| prizes = Shanti Swarup Bhatnagar Award, Padma Bhushan, Fellow of the Royal Society

}}

Conjeevaram Srirangachari Seshadri {{cite web |last1=Sharma |first1=Rahul |title=एक महान गणितज्ञ और संगीत प्रेमी : सी एस शेषाद्रि |work=Ajab Gajab Facts |date=14 September 2021 |url=https://www.ajabgajabfacts.com/cs-seshadri-biography-in-hindi/}}{{small|FRS}} (29 February 1932 – 17 July 2020) was an Indian mathematician.{{Cite journal|year=2012|title=C S Seshadri – A Glimpse of His Mathematical Personality|url=http://www.asiapacific-mathnews.com/02/0204/0017_0021.pdf|journal=Asia Pacific Mathematics Newsletter|volume=2|pages=17–21|url-status=bot: unknown|archive-url=https://web.archive.org/web/20161210104338/http://www.asiapacific-mathnews.com/02/0204/0017_0021.pdf|archive-date=10 December 2016|df=dmy-all}} He was the founder and director-emeritus of the Chennai Mathematical Institute, and is known for his work in algebraic geometry.{{cite web

| url = https://www.cmi.ac.in/seshadri/

| title = C.S. Seshadri's official profile at Chennai Mathematical Institute

}} 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 was a recipient of the Padma Bhushan in 2009, the third highest civilian honor in the country.{{cite news| url=http://www.financialexpress.com/news/prof.-c-s-seshadri-to-be-conferred-prestigious-rathindra-puraskar-from-visva-bharrati/389880/| title=Prof. C S Seshadri to be conferred prestigious Rathindra Puraskar from Visva Bharrati| work=BUSINESSWIRE INDIA| date= 24 November 2008 }}

Degrees and posts

Seshadri was born into a Hindu Brahmin family in Kanchipuram, Tamil Nadu.{{Cite web|url=https://bhavana.org.in/proofs-transcendence-cs-seshadri/|title = From Proofs to Transcendence, via Theorems and Rāgas – Bhāvanā}} He received his B.A. (Hons) degree in mathematics from Madras University in 1953 and was mentored by the Jesuit priest Fr. Charles Racine and S. Naryanan there.{{Cite web|url=http://gaddeswarup.blogspot.com/2008/09/remembering-fr-racine.html|title=Gaddeswarup's blog: Remembering Fr. Racine|date=4 September 2008}}{{Cite news|url=http://www.thehindu.com/features/magazine/constant-mathematician/article5764243.ece|title='Constant' Mathematician|last=RAMANI|first=HEMA IYER|newspaper=The Hindu|access-date=2016-12-10}} He completed his PhD from Bombay University in 1958 under the supervision of K. S. Chandrasekharan.{{MathGenealogy|id=75172|name=C. S. Seshadri}} He was elected Fellow of the Indian Academy of Sciences in 1971.Information of the Indian Academy of Sciences {{cite web|url=http://www.ias.ac.in/php/fell_detail.php3?name=Seshadri&intials=Conjeevaram&year=29-02-1932|title=Fellow Profile of Prof. C.S. Seshadri}}

Seshadri worked in the School of Mathematics at the Tata Institute of Fundamental Research in Bombay from 1953 to 1984 starting as a Research Scholar and rising to a senior professor. From 1984 to 1989, he worked at the Institute of Mathematical Sciences, Chennai. From 1989 to 2010, he worked as the founding director of the Chennai Mathematical Institute. After stepping down he continued to be the institute's Director-Emeritus till his death in 2020. He also served on the Mathematical Sciences jury for the Infosys Prize in 2010 and 2011.

Visiting professorships

University of Paris, France
Harvard University, Cambridge
UCLA
Brandeis University
University of Bonn, Bonn
Kyoto University, Kyoto, Japan

He has given talks at the ICM.

Awards and fellowships

Honorary degree, Université Pierre et Marie Curie (UPMC), Paris, 2013{{Cite web | url=http://www.upmc.fr/fr/universite/histoire_et_personnalites/les_docteurs_honoris_causa/dhc2013/conjeevaram_srirangachari_seshadri.html |title = Sorbonne Université}}
Honoris Causa, University of Hyderabad, India
Padma Bhushan
Shanti Swarup Bhatnagar Award
Srinivasa Ramanujan Medal from the Indian Academy of Sciences
Honorary D.Sc. from Banaras Hindu University
TWAS Science Award{{cite web|url=https://twas.org/article/twas-illycaffe-announce-2006-trieste-science-prize-winners|title=TWAS, illycaffè announce 2006 Trieste Science Prize winners|date=11 June 2006 }}
Fellow of IAS, INSA and a Fellow of the Royal Society
Membership of the United States National Academy of Sciences{{cite web|last=O'Leary|first=Maureen|title=72 New Members Chosen By Academy|url=http://www8.nationalacademies.org/onpinews/newsitem.aspx?RecordID=04272010|publisher=National Academy of Sciences|access-date=22 September 2010}}
Fellow of the American Mathematical Society, 2012[https://www.ams.org/profession/fellows-list List of Fellows of the American Mathematical Society], retrieved 18 July 2013.

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.

Publications

{{cite journal

|author1=Narasimhan, M. S. |author2=Seshadri, C. S.

| title = Stable and unitary vector bundles on a compact Riemann surface

| journal = Annals of Mathematics

| volume = 82

| year = 1965

| pages = 540–567

| mr = 0184252

| jstor = 1970710

| doi = 10.2307/1970710

| issue = 3

| publisher = The Annals of Mathematics, Vol. 82, No. 3

|author1-link=M S Narasimhan

}}

{{Citation | last1=Seshadri | first1=C. S. | title=Introduction to the theory of standard monomials | url=https://www.ams.org/bookstore-getitem/item=HIN-34 | publisher=Hindustan Book Agency | location=New Delhi | series=Texts and Readings in Mathematics | isbn=9788185931784 |mr=2347272 | year=2007 | volume=46}}
{{Cite book|last=Seshadri|first=C.S.|url=https://www.springer.com/gp/book/9789386279491|title=Studies in the History of Indian Mathematics|publisher=New Delhi: Hindustan Book Agency|year=2010|isbn=9789380250069}}
{{Citation | last1=Seshadri | first1=C. S. | title=Collected papers of C. S. Seshadri. Volume 1. Vector bundles and invariant theory | url=https://www.ams.org/bookstore-getitem/item=HIN-50 | publisher=Hindustan Book Agency | location=New Delhi | isbn=9789380250175 |mr=2905897 | year=2012}}
{{Citation | last1=Seshadri | first1=C. S. | title=Collected papers of C. S. Seshadri. Volume 2. Schubert geometry and representation theory. | url=https://www.ams.org/bookstore-getitem/item=HIN-50 | publisher=Hindustan Book Agency | location=New Delhi | isbn=9789380250175 |mr=2905898 | year=2012}}

Notes

References

{{Cite book | year=2003 | title = A tribute to C.S. Seshadri: a collection of articles on geometry and representation theory | url=https://books.google.com/books?id=sjGmWWicE10C| author1=Seshadri, C. S. | author2=Lakshmibai, Venkatramani|publisher=Springer Science & Business Media |isbn=978-3-7643-0444-7}}
{{cite web

|url = http://bhavana.org.in/proofs-transcendence-cs-seshadri/

|title = From Proofs to Transcendence, via Theorems and Rāgas – C.S. Seshadri in Conversation

|date = January 2018

|publisher = Bhāvanā

}}