Sivaguru S. Sritharan

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| name = Sivaguru S. Sritharan

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Sivaguru S. Sritharan (also known as S. S. Sritharan) is an American aerodynamicist and mathematician.{{Cite web|url=http://www.msruas.ac.in/organisation/vc|title=Vice Chancellor|access-date=July 19, 2020|work=Ramaiah University of Applied Sciences}}

Sritharan served in civilian universities such as University of Southern California and University of Wyoming as faculty member and head of the department and also in the Department of Defense (U. S. Navy and U. S. Air Force) in various capacities ranging from scientist to leadership roles, and also held visiting positions at several international institutions.

He served as the vice chancellor at the Ramaiah University of Applied Sciences in Bengaluru, India.

Education

Sritharan had his high schooling at Jaffna Central College. He then joined at University of Sri Lanka (Peradeniya) and obtained a BSc (Honors) degree in mechanical engineering. He obtained a Master of Science degree in aeronautics and astronautics from University of Washington and a master's degree and Ph.D. in applied mathematics from University of Arizona.{{Cite web|url=https://contactout.com/SIVAGURUS-SRITHARAN-1059022|title=SIVAGURU S. SRITHARAN|access-date=July 19, 2020|work=ContactOut}}

Career

Sritharan served as the first provost and vice chancellor of the Air Force Institute of Technology at Dayton, Ohio and as the dean of the Graduate School of Engineering and Applied Sciences at the Naval Postgraduate School, Monterey, California.

He was a professor and head of the Department of Mathematics at University of Wyoming and head of the Science and Technology Branch at the Naval Information Warfare Systems Command in San Diego.

Contributions

Sritharan is known for his research contributions in rigorous mathematical theory, optimal control and stochastic analysis of fluid mechanics and magneto-hydrodynamics.{{Citation

| last= Sritharan | first= S.S.

| year= 2019

| title= Invariant Manifold Theory for Hydrodynamic Transition

| publisher= Courier Dover Publications

| isbn= 9780486828282

| url= https://books.google.com/books?id=ADiTtgEACAAJ

}}{{Citation

| last= Sritharan | first= S.S.

| year= 1998

| title= Optimal Control of Viscous Flow

| publisher= SIAM

| isbn= 9780898714067

| url= https://books.google.com/books?id=uoBXMaeuuloC&q=Optimal+Control+of+Viscous+Flow

}}

His notable contributions include:

1. Developing dynamic programming method for the equations of fluid dynamics. This subject is closely related to reinforcement learning in the language of machine learning.{{Citation

| last= Sritharan | first= S.S.

| year= 1991

| title= "Dynamic Programming of the Navier-Stokes Equations," in Systems and Control Letters, Vol. 16, No. 4, pp. 299-307

| journal= Systems & Control Letters

| volume= 16

| issue= 4

| pages= 299–307

| publisher= Elsevier

| doi= 10.1016/0167-6911(91)90020-F

| url= https://dx.doi.org/10.1016/0167-6911%2891%2990020-F

|access-date=July 20, 2020| url-access= subscription

}}

2. First complete proof of the Pontryagin’s Maximum Principle for fluid dynamic equations with state constraints, as a joint work with UCLA mathematician Hector. O. Fattorini.{{Citation

| last1=Fattorini| first1=H. O.

| last2=Sritharan | first2= S.S.

| year= 1994

| title= "Necessary and Sufficient Conditions for Optimal Controls in Viscous Flow," Proceedings of the Royal Society of Edinburgh, Series A, Vol. 124A, pp. 211-251

| journal=Proceedings of the Royal Society of Edinburgh Section A: Mathematics

| volume=124

| issue=2

| pages=211–251

| publisher= Proceedings of the Royal Society

| doi=10.1017/S0308210500028444

| s2cid=18018847

| url= https://www.cambridge.org/core/journals/proceedings-of-the-royal-society-of-edinburgh-section-a-mathematics/article/necessary-and-sufficient-conditions-for-optimal-controls-in-viscous-flow-problems/60E9D5113DD26331EFE288201EB4BBA4

|access-date=July 20, 2020| url-access=subscription

}}

3. Developing robust (H-infinity) control theory for fluid dynamics as a joint work with Romanian mathematician Viorel P. Barbu.{{Citation

| last1=Barbu| first1= V.

| last2=Sritharan | first2= S.S.

| year= 1998

| title= "H-infinity-control theory of fluid dynamics," Proceedings of The Royal Society of London, Series A, pp. 3009-3033, Vol. 356, No. 1979, November 1998

| publisher= Proceedings of the Royal Society

| url= https://www.afit.edu/BIOS/docs/R19.pdf

|access-date=July 20, 2020}}

4. First successful rigorous theory establishing a direct stochastic analogy to the famous Jacques-Louis Lions and G. Prodi (1959) on existence and uniqueness theorem for the two dimensional Navier-Stokes equation as a joint work with J. L. Menaldi utilizing a subtle local monotonicity property.{{Citation

| last1=Menaldi| first1= J. L.

| last2=Sritharan | first2= S.S.

| year= 2002

| title= "Stochastic 2-D Navier-Stokes equation," Applied Mathematics and Optimization, 46, 2002, pp. 31-53

| publisher= Wayne State University

| url= https://digitalcommons.wayne.edu/cgi/viewcontent.cgi?article=1083&context=mathfrp

|access-date=July 20, 2020}}

5. Proving Large Deviation Principle for stochastic Navier-Stokes equation as a joint work with P. Sundar to estimate the probability of rare events.{{Citation

| last1= Sundar| first1= P.

| last2=Sritharan | first2= S.S.

| year= 2006

| title= "Large Deviations for Two-dimensional Stochastic Navier-Stokes Equations", Stochastic Processes, Theory and Applications, Vol. 116, Issue 11, (2006), 1636-1659

| publisher= Elsevier

| url= https://www.afit.edu/BIOS/docs/R37.pdf

|access-date=July 20, 2020}}