Ambar Sengupta

Ambar Niel Sengupta is an Indian-American mathematician. He is a professor of mathematics at the University of Connecticut.

Ambar N. Sengupta
Sengupta in 2016
Born	(1963-07-20)July 20, 1963 Calcutta, India
Nationality	American
Alma mater	Presidency College, Calcutta (BSc, 1984) Cornell University (Ph.D., 1990)
Scientific career
Fields	Mathematics Mathematical physics
Institutions	Louisiana State University University of Connecticut
Doctoral advisor	Leonard Gross
Website	math.uconn.edu/person/ambar-sengupta/

Education and career

Ambar Sengupta attended Presidency College, Calcutta and stood first class first in the BSc (Mathematics Honours) examination of the University of Calcutta in 1984.^{[citation needed]} He then joined Cornell University, where he obtained an MS and then a PhD under the supervision of Leonard Gross in 1990.^[1]

After a post-doctoral appointment in the Physics Department of Princeton University, he joined Louisiana State University. He became a professor of mathematics in 2003, and he was awarded the Hubert Butts Alumni Professorship in 2011.^[2] Sengupta joined the Mathematics faculty of the University of Connecticut as Professor and Head of the Department in 2016.^{[citation needed]}

Professional activities

Sengupta's contributions have been in the fields of pure mathematics, mathematical physics, and financial mathematics.

In quantum field theory, Sengupta gave the first rigorous construction of the Yang-Mills measure for compact surfaces, with or without boundary and for bundles of specified topology. He used this to mathematically prove formulas that had been used in the physics literature and discovered new formulas for non-trivial bundles.^[3][4] He gave a rigorous proof of Edward Witten's formula for the volume of the moduli space of flat connections on a compact oriented surface, and proved that the Yang-Mills measure converges to this limiting measure.^[5][6] He is an initiator of the rigorous study of the large-N limit of Yang-Mills theory in two dimensions. He and Michael Anshelevich showed that the limit of the U(N) Yang-Mills measure for the plane is described by free probability theory, confirming ideas initiated by I. M. Singer.^[4] He has published extensively in infinite-dimensional geometry and measure theory, as well as higher gauge theory.

He has served as doctoral advisor or co-advisor to 8 PhD students.^[7]

Ambar Sengupta is the founding Managing Editor of the Journal of Stochastic Analysis.^[8] He is a Council Member of the New England Statistical Society.^[9]

Awards and honors

Ambar Sengupta was awarded a Humboldt fellowship in 1995.^[10] He was named a Mercator Fellow by the Deutsche Forschungsgemeinschaft (German Research Foundation) in 2011; he was invited to a visiting professorship at the University of Bonn with this award.^[11][12]

Selected publications

• Gross, Leonard; King, Christopher; Sengupta, Ambar (1989). "Two dimensional Yang-Mills theory via stochastic differential equations". Annals of Physics. 194 (1): 65–112. Bibcode:1989AnPhy.194...65G. doi:10.1016/0003-4916(89)90032-8.
• Sengupta, Ambar (1997). Gauge Theory on Compact Surfaces. American Mathematical Society. ISBN 9780821804841.
• Cochran, W. G.; Kuo, H.-H.; Sengupta, A. (1998). "A New Class of White Noise Generalized Functions". Infinite Dimensional Analysis, Quantum Probability and Related Topics. 1 (1): 43–67. doi:10.1142/S0219025798000053.
• Sengupta, Ambar (2012). Representing Finite Groups: A Semisimple Introduction. Springer. pp. 1–371. ISBN 978-1-4614-1231-1.
• Sengupta, Ambar (2005). Pricing Derivatives. USA: McGraw-Hill. pp. 1–282. ISBN 9780071445887.