View source for C. S. Seshadri

{{Short description|Indian mathematician (1932–2020)}}
{{About|the Indian mathematician|the Indian civil servant|Chikmagalur Seetaramiah Seshadri}}
{{Use Indian English|date=August 2015}}
{{Use dmy dates|date=January 2020}}
{{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]]<br/>[[Narasimhan–Seshadri theorem]]<br/>[[Standard monomial theory]]
| prizes            = [[Shanti Swarup Bhatnagar Award]], [[Padma Bhushan]], [[Fellow of the Royal Society]]
}}

'''Conjeevaram Srirangachari Seshadri''' <ref>{{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/}}</ref>{{small|[[Fellow of the Royal Society|FRS]]}} (29 February 1932 – 17 July 2020) was an Indian mathematician.<ref>{{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}}</ref> He was the founder and director-emeritus of the [[Chennai Mathematical Institute]], and is known for his work in [[algebraic geometry]].<ref>{{cite web
 | url = https://www.cmi.ac.in/seshadri/
 | title = C.S. Seshadri's official profile at Chennai Mathematical Institute
}}</ref> 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 bundle]]s 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.<ref>{{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 }}</ref>

==Degrees and posts==

Seshadri was born into a [[Hindu]] [[Brahmin]] family in [[Kanchipuram]], [[Tamil Nadu]].<ref>{{Cite web|url=https://bhavana.org.in/proofs-transcendence-cs-seshadri/|title = From Proofs to Transcendence, via Theorems and Rāgas – Bhāvanā}}</ref> 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.<ref>{{Cite web|url=http://gaddeswarup.blogspot.com/2008/09/remembering-fr-racine.html|title=Gaddeswarup's blog: Remembering Fr. Racine|date=4 September 2008}}</ref><ref>{{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}}</ref> He completed his PhD from [[Bombay University]] in 1958 under the supervision of [[K. S. Chandrasekharan]].<ref>{{MathGenealogy|id=75172|name=C. S. Seshadri}}</ref> He was elected Fellow of the [[Indian Academy of Sciences]] in 1971.<ref>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}}</ref>

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 [[International Congress of Mathematicians|ICM]].

==Awards and fellowships==

* Honorary degree, [[Université Pierre et Marie Curie]] (UPMC), Paris, 2013<ref>{{Cite web | url=http://www.upmc.fr/fr/universite/histoire_et_personnalites/les_docteurs_honoris_causa/dhc2013/conjeevaram_srirangachari_seshadri.html |title = Sorbonne Université}}</ref>
* 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<ref>{{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 }}</ref>
* Fellow of IAS, INSA and a [[Fellow of the Royal Society]]
* Membership of the [[United States National Academy of Sciences]]<ref>{{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}}</ref>
* Fellow of the [[American Mathematical Society]], 2012<ref>[https://www.ams.org/profession/fellows-list List of Fellows of the American Mathematical Society], retrieved 18 July 2013.</ref>

==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==
{{Reflist}}

==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 <!--Birkhäuser-->|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
}}

==External links==
*{{commons category-inline}}

{{PadmaBhushanAwardRecipients 2000–09}}
{{SSBPST recipients in Mathematical Science}}
{{Shanti Swarup Bhatnagar Laureates of Tamil Nadu}}

{{Authority control}}

{{DEFAULTSORT:Seshadri, C.S.}}
[[Category:1932 births]]
[[Category:2020 deaths]]
[[Category:Algebraic geometers]]
[[Category:20th-century Indian mathematicians]]
[[Category:Harvard University staff]]
[[Category:University of Madras alumni]]
[[Category:University of Mumbai alumni]]
[[Category:Recipients of the Padma Bhushan in science & engineering]]
[[Category:Tamil scholars]]
[[Category:Foreign associates of the National Academy of Sciences]]
[[Category:Fellows of the American Mathematical Society]]
[[Category:Fellows of the Royal Society]]
[[Category:Fellows of the Indian Academy of Sciences]]
[[Category:Tata Institute of Fundamental Research alumni]]
[[Category:21st-century Indian mathematicians]]
[[Category:Recipients of the Shanti Swarup Bhatnagar Award in Mathematical Science]]
[[Category:People from Kanchipuram district]]