Sathamangalam Ranga Iyengar Srinivasa Varadhan,  (born 2 January 1940) is an Indian American mathematician. He is known for his fundamental contributions to probability theory and in particular for creating a unified theory of large deviations.
Sathamangalam Ranga Iyengar Srinivasa Varadhan, born on January 2, 1940, is an Indian-American mathematician. He is well-known for his substantial contributions to probability theory and specifically for crafting a unified theory of large deviations.