Ramachandran Balasubramanian (born 15 March 1951) is an Indian

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...

and was Director of the Institute of Mathematical Sciences in Chennai, India. He is known for his work in

number theory Number theory is a branch of pure mathematics devoted primarily to the study of the integers and arithmetic functions. Number theorists study prime numbers as well as the properties of mathematical objects constructed from integers (for example ...

, which includes settling the final g(4) case of

Waring's problem In number theory, Waring's problem asks whether each natural number ''k'' has an associated positive integer ''s'' such that every natural number is the sum of at most ''s'' natural numbers raised to the power ''k''. For example, every natural num ...

in 1986. He is also known for his work in

Cryptography Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), ...

which includes his famous work with Koblitz, now commonly called the ''Balu-Koblitz Theorem''. His work in Additive Combinatorics includes his two page paper on additive complements of squares, hence disproving a long standing conjecture of Erdős. His works on moments of Riemann zeta function is highly appreciated and he was a plenary speaker from India at ICM in 2010. He was a visiting scholar at the

Institute for Advanced Study The Institute for Advanced Study (IAS) is an independent center for theoretical research and intellectual inquiry located in Princeton, New Jersey. It has served as the academic home of internationally preeminent scholars, including Albert Ein ...

in 1980-81. He was a student of K. Ramachandra, a lifelong collaborator of Jean-Marc Deshouillers, and co-authored stellar mathematicians like Ram Murty,

Kumar Murty image:YaudheyaCoin.jpg, A coin, around 200 BCE, of the Yaudheyas with depiction of Kumāra Karttikeya Kumar (; Sanskrit language, Sanskrit: wikt:कुमार, कुमार ''kumārá'') is a title, given name, middle name, or a family nam ...

, Heath-Brown, N. Koblitz and F. Luca. He was the founder and remains a member of the advisory board of the Hardy-Ramanujan Journal.

Awards and honours

He has received the following awards: *The Shanti Swarup Bhatnagar Prize for Science and Technology in 1990. *The French government's

Ordre National du Mérite The (; ) is a French order of merit with membership awarded by the President of the French Republic, founded on 3 December 1963 by President Charles de Gaulle. The reason for the order's establishment was twofold: to replace the large number of ...

for "furthering Indo-French cooperation in the field of mathematics" in 2003. *The

Padma Shri The Padma Shri (IAST: ''padma śrī'', lit. 'Lotus Honour'), also spelled Padma Shree, is the fourth-highest Indian honours system, civilian award of the Republic of India, after the Bharat Ratna, the Padma Vibhushan and the Padma Bhushan. In ...

, the fourth highest civilian award in India, in 2006. *Fellow of the

American Mathematical Society The American Mathematical Society (AMS) is an association of professional mathematicians dedicated to the interests of mathematical research and scholarship, and serves the national and international community through its publications, meetings, ...

, 2012. *Th
Lifetime Achievement Award, 2013
awarded by Manmohan Singh, the Prime Minister of India. *Fellow of the

Indian National Science Academy The Indian National Science Academy (INSA) is a national academy in New Delhi New Delhi (; ) is the Capital city, capital of India and a part of the Delhi, National Capital Territory of Delhi (NCT). New Delhi is the seat of all three b ...

(1988)

References

External links

R. Balasubramian's homepage

His CV
{{DEFAULTSORT:Balasubramanian, Ramachandran 20th-century Indian mathematicians Recipients of the Padma Shri in science & engineering Living people Fellows of the Indian National Science Academy Tata Institute of Fundamental Research alumni Institute for Advanced Study visiting scholars Fellows of the American Mathematical Society Fellows of the Indian Academy of Sciences 1951 births Recipients of the Shanti Swarup Bhatnagar Award in Mathematical Science