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{{short description|Indian mathematician}}
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{{Infobox Scientist
{{more citations needed|date=May 2022}}
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| name = K. G. Ramanathan
{{Use dmy dates|date=June 2018}}
| image = Replace_this_image_male.svg
{{Use Indian English|date=June 2018}}
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| birth_date = November 13, 1920
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{{Infobox scientist
| birth_place =
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| name = K. G. Ramanathan
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| death_date = May 10, 1992
| image = K. G. Ramanathan.jpg
| death_place =
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| birth_date = 13 November 1920
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| residence = [[Colaba]]
| birth_place = [[Hyderabad, India|Hyderabad]], [[British India]]
|residence =
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| death_date = 10 May 1992 (aged 71)
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|citizenship = [[India]]n [[Image:Flag of India.svg|15px|]]
| death_place = [[Bombay]], [[India]]
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|ethnicity =
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| residence = <!--[[Colaba]]-->
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| occupation = Mathematician
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| citizenship = [[India]]n
| salary =
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| ethnicity =
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| spouse = Jayalakshmi Ramanathan
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| occupation = Mathematician
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| field = [[Number theory]]
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| spouse = Jayalakshmi Ramanathan
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| field = [[Number theory]]
| work_institution = [[TIFR]]
| work_institution = [[TIFR]]
| alma_mater=[[Princeton University]]
| alma_mater = [[Princeton University]]
|doctoral_advisor = [[Emil Artin]]
| doctoral_advisor = [[Emil Artin]]
| doctoral_students = [[C. P. Ramanujam]]<br>[[Kanakanahalli Ramachandra]]
| known_for =
| known_for =
| prizes = [[Padma Bhushan]]
| prizes = [[Padma Bhushan]]
| website =
}}
}}
'''Kollagunta Gopalaiyer Ramanathan''' (13 November 1920 – 10 May 1992) was an Indian [[mathematician]] known for his work in [[number theory]]. His contributions are also to the general development of mathematical research,<ref>{{Cite book |last=Mahbubani |first=Kishore |title=The New Asian Hemisphere: The Irresistible Shift of Global Power to the Eas |publisher=ReadHowYouWant.com, Limited |year=2010 |isbn=9781458759610 |pages=3}}</ref> and teaching in India.


==K. G. Ramanathan's early life and his family==
'''Kollagunta Gopalaiyer Ramanathan''' ([[November 13]], [[1920]] - [[May 10]], [[1992]]) (KGR) was a front rank [[India]]n [[mathematician]] of international reputation with distinguished and well-recognized achievements in [[number theory]]. He had contributed in no small measure to the emergence of a new generation of high-calibre mathematicians as well as to the general development of mathematical research and teaching in India.
K. G. Ramanathan was born in [[Hyderabad, India|Hyderabad]], South India, on 13 November 1920<ref>{{Cite book |last=Indian National Science Academy |title=Fellows of the Indian National Science Academy N-Z |publisher=The Academy |year=1994 |pages=678}}</ref> to Sri Kollagunta Gopal Iyer and Smt. Anantalakshmi, and was one of three children in the family.<ref name=":0">{{Cite journal |last=Athreya |first=K. B. |date=February 2010 |title=K G Ramanathan |url=https://dx.doi.org/10.1007/s12045-010-0022-8 |journal=Resonance: Journal of Science Education |volume=15 |issue=2 |pages=98–101 |doi=10.1007/s12045-010-0022-8|s2cid=120777703 }}</ref>


Ramanathan received his early education from Wesleyan Mission High School in [[Secunderabad]]. He further pursued his academic interests in mathematics and obtained a BA degree from Nizam College, Hyderabad, in 1940. Later, in 1942, he completed his Master's degree in mathematics from [[Loyola College, Chennai|Loyola College]] in [[Chennai]] (then known as Madras). Sources state that Ramanathan's academic journey was also influenced by mathematics teacher and [[Jesuits|Jesuit priest]], Rev Fr. C Racine, who was a former student of the renowned French mathematician [[Élie Cartan|E Cartan]].<ref name=":0" />
==Early life==
K. G. Ramanathan was born in [[Hyderabad, India|Hyderabad]] in South India. He completed his B.A. and M.A. in mathematics at [[Osmania University]] and the [[University of Madras]] respectively before going to [[Princeton University|Princeton]] to earn his Ph.D; his advisor was [[Emil Artin]]. At Princeton, K. G. Ramanathan also worked with [[Hermann Weyl]] and [[Carl Siegel]]. Thereafter he returned to India to team up with [[K. Chandrasekharan]] at the [[Tata Institute of Fundamental Research]] (TIFR) at [[Colaba]] in 1951.


With a keen passion for teaching and research in mathematics, Ramanathan worked as an assistant lecturer at [[Annamalai University|Annamalai University in Chidambaram]], [[Tamil Nadu]] from 1945-1946. He then joined [[Osmania University]], Hyderabad as a lecturer for the following two years. In 1948, he became a research scholar at the [[University of Madras]], where he had the opportunity to work alongside esteemed mathematicians including Professors R Vaidhyanathaswamy and T Vijayraghavan. In the same year, Ramanathan received an invitation to attend the Institute for Advanced Study (IAS) at [[Princeton University|Princeton]]. Whilst there, Ramanathan worked alongside [[Hermann Weyl]] and [[Carl Siegel]],<ref>{{Cite journal |last=Narasimhan |first=M. S. |date=February 2010 |title=Reminiscences |url=https://search.ebscohost.com/login.aspx?direct=true&db=ehh&AN=48129032&lang=en-gb&site=eds-live&scope=site |journal=Resonance: Journal of Science Education |volume=15 |issue=2 |pages=101}}</ref> and is said to have sung Carnatic songs of [[Tyagaraja]] to the legendary physicist [[Albert Einstein]], who was Ramanathan's neighbour at the University. Until 1951, along with [[Emil Artin]], Siegel supervised Ramanathan in his PhD studies in mathematics.<ref name=":0" />
K. G. Ramanthan was married to Jayalakshmi Ramanathan.

Following the successful completion of his PhD, Ramanathan returned to India to team up with [[K. S. Chandrasekharan]] at the [[Tata Institute of Fundamental Research]] (TIFR) at [[Colaba]] in 1951.<ref>{{Cite book |title=Proceedings of the International Congress of Mathematicians: Hyderabad, August 19-27, 2010 · Volume 1 |publisher=Hindustan Book Agency |year=2011 |isbn=9789814324359 |editor-last=Bhatia |editor-first=Rajendra |location=India |pages=187}}</ref>

Ramanathan was married to Jayalakshmi Ramanathan. He had two sons. His mother died at an early age.


==Career==
==Career==
At TIFR, he built up the number theory group of young mathematicians from India. For several years, he took interest to study [[Ramanujan]]'s unpublised and published work. He was a Editorial board member of [[Acta Arithmetica]] for over 30 years.
At TIFR, he built up the number theory group of young mathematicians from India. For several years, he took interest to study [[Ramanujan]]'s unpublished and published work. He was an Editorial board member of [[Acta Arithmetica]] for over 30 years. He retired from TIFR in 1985.


His [[Erd&#337;s number]] is 2.
===Awards===
===Awards===
K. G. Ramanathan was given numerous achievements during his more than 30 years service at TIFR.
Ramanathan was given numerous achievements during his more than 30 years service at TIFR.


* [[Padma Bhushan]], 1983<ref name="Padma Awards">{{cite web|url=http://mha.nic.in/sites/upload_files/mha/files/LST-PDAWD-2013.pdf |title=Padma Awards |publisher=Ministry of Home Affairs, Government of India |date=2015 |access-date=21 July 2015 |url-status=dead |archive-url=https://web.archive.org/web/20151015193758/http://mha.nic.in/sites/upload_files/mha/files/LST-PDAWD-2013.pdf |archive-date=15 October 2015 }}</ref>
* [[Padma Bhushan]]
* [[Shanti Swarup Bhatnagar Award]]
* [[Shanti Swarup Bhatnagar Award]], 1965
* Fellow of [[Indian Academy of Sciences]]
* Fellow of [[Indian Academy of Sciences]]
* Fellow of [[Indian National Science Academy]]
* Fellow of [[Indian National Science Academy]]
* Honorary fellow of TIFR.
* Honorary fellow of TIFR.


===Selected publications===
==See also his Ph.D students==
* On [[Ramanujan]]’s continued fraction, KG Ramanathan - Acta Arith, 1984
* [[C. P. Ramanujam]]
* Some applications of [[Kronecker’s limit formula]], KG Ramanathan - J. Indian Math. Soc, 1987

==References==
{{Reflist}}


==External links==
==External links==
* {{MathGenealogy|id=24341}}
* {{MathGenealogy|id=24341}}
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* [https://web.archive.org/web/20040108094258/http://www.numbertheory.org/obituaries/AA/ramanathan/page1.html Obituary, reproduced from ''Acta Arithmetica''], [[Srinivasacharya Raghavan|Author: S. Raghavan]]
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* [https://web.archive.org/web/20060928055803/http://www.numbertheory.org/obituaries/AA/ramanathan/page0.html K. G. R's Photo This is reproduced from Acta Arithmetica 64 (1993) 1-6 ]
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* [https://web.archive.org/web/20081121140650/http://www.gap-system.org/~history/Biographies/Ramanathan.html K. G. Ramanathan's Biography]
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{{SSBPST recipients in Mathematical Science}}


{{PadmaBhushanAwardRecipients 1980–89}}
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*[http://www.numbertheory.org/obituaries/AA/ramanathan/page1.html Obituary, reproduced from ''Acta Arithmetica'', [[Srinivasacharya Raghavan | Author: S. Raghavan]] ]
{{Authority control}}


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* [http://www.numbertheory.org/obituaries/AA/ramanathan/page0.html K. G. R's Photo This is reproduced from Acta Arithmetica 64 (1993) 1-6 ]

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* [http://www.gap-system.org/~history/Biographies/Ramanathan.html K. G. Ramanathan's Biography]
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{{SSBPST recipients in Mathematical Science}}
{{DEFAULTSORT:Ramanathan, Kollagunta Gopalaiyer}}
{{DEFAULTSORT:Ramanathan, Kollagunta Gopalaiyer}}

[[Category:1920 births]]
[[Category:1920 births]]
[[Category:1992 deaths]]
[[Category:1992 deaths]]
[[Category:Padma Bhushan recipients]]
[[Category:Recipients of the Padma Bhushan in literature & education]]
[[Category:Indian mathematicians]]
[[Category:Indian number theorists]]
[[Category:Number theorists]]
[[Category:Presidents of the Indian Mathematical Society]]
[[Category:20th-century mathematicians]]
[[Category:University of Madras alumni]]
[[Category:Tamil people]]
[[Category:Osmania University alumni]]
[[Category:Telagu people]]
[[Category:Scientists from Hyderabad, India]]
[[Category:Tamil Indians]]
[[Category:20th-century Indian mathematicians]]
[[Category:Recipients of the Shanti Swarup Bhatnagar Award in Mathematical Science]]
[[Category:Indian Hindus]]
[[ht:Kollagunta Gopalaiyer Ramanathan]]

Latest revision as of 11:57, 9 March 2024

K. G. Ramanathan
Born13 November 1920
Hyderabad, British India
Died10 May 1992 (aged 71)
Bombay, India
CitizenshipIndian
Alma materPrinceton University
OccupationMathematician
SpouseJayalakshmi Ramanathan
AwardsPadma Bhushan
Scientific career
FieldsNumber theory
InstitutionsTIFR
Doctoral advisorEmil Artin
Doctoral studentsC. P. Ramanujam
Kanakanahalli Ramachandra

Kollagunta Gopalaiyer Ramanathan (13 November 1920 – 10 May 1992) was an Indian mathematician known for his work in number theory. His contributions are also to the general development of mathematical research,[1] and teaching in India.

K. G. Ramanathan's early life and his family

[edit]

K. G. Ramanathan was born in Hyderabad, South India, on 13 November 1920[2] to Sri Kollagunta Gopal Iyer and Smt. Anantalakshmi, and was one of three children in the family.[3]

Ramanathan received his early education from Wesleyan Mission High School in Secunderabad. He further pursued his academic interests in mathematics and obtained a BA degree from Nizam College, Hyderabad, in 1940. Later, in 1942, he completed his Master's degree in mathematics from Loyola College in Chennai (then known as Madras). Sources state that Ramanathan's academic journey was also influenced by mathematics teacher and Jesuit priest, Rev Fr. C Racine, who was a former student of the renowned French mathematician E Cartan.[3]

With a keen passion for teaching and research in mathematics, Ramanathan worked as an assistant lecturer at Annamalai University in Chidambaram, Tamil Nadu from 1945-1946. He then joined Osmania University, Hyderabad as a lecturer for the following two years. In 1948, he became a research scholar at the University of Madras, where he had the opportunity to work alongside esteemed mathematicians including Professors R Vaidhyanathaswamy and T Vijayraghavan. In the same year, Ramanathan received an invitation to attend the Institute for Advanced Study (IAS) at Princeton. Whilst there, Ramanathan worked alongside Hermann Weyl and Carl Siegel,[4] and is said to have sung Carnatic songs of Tyagaraja to the legendary physicist Albert Einstein, who was Ramanathan's neighbour at the University. Until 1951, along with Emil Artin, Siegel supervised Ramanathan in his PhD studies in mathematics.[3]

Following the successful completion of his PhD, Ramanathan returned to India to team up with K. S. Chandrasekharan at the Tata Institute of Fundamental Research (TIFR) at Colaba in 1951.[5]

Ramanathan was married to Jayalakshmi Ramanathan. He had two sons. His mother died at an early age.

Career

[edit]

At TIFR, he built up the number theory group of young mathematicians from India. For several years, he took interest to study Ramanujan's unpublished and published work. He was an Editorial board member of Acta Arithmetica for over 30 years. He retired from TIFR in 1985.

Awards

[edit]

Ramanathan was given numerous achievements during his more than 30 years service at TIFR.

Selected publications

[edit]

References

[edit]
  1. ^ Mahbubani, Kishore (2010). The New Asian Hemisphere: The Irresistible Shift of Global Power to the Eas. ReadHowYouWant.com, Limited. p. 3. ISBN 9781458759610.
  2. ^ Indian National Science Academy (1994). Fellows of the Indian National Science Academy N-Z. The Academy. p. 678.
  3. ^ a b c Athreya, K. B. (February 2010). "K G Ramanathan". Resonance: Journal of Science Education. 15 (2): 98–101. doi:10.1007/s12045-010-0022-8. S2CID 120777703.
  4. ^ Narasimhan, M. S. (February 2010). "Reminiscences". Resonance: Journal of Science Education. 15 (2): 101.
  5. ^ Bhatia, Rajendra, ed. (2011). Proceedings of the International Congress of Mathematicians: Hyderabad, August 19-27, 2010 · Volume 1. India: Hindustan Book Agency. p. 187. ISBN 9789814324359.
  6. ^ "Padma Awards" (PDF). Ministry of Home Affairs, Government of India. 2015. Archived from the original (PDF) on 15 October 2015. Retrieved 21 July 2015.
[edit]
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