We will start with an introductory lecture on large Deviations.
We will describe the general theory and illustrate it with many
elementary examples like Cramér's theory for sums of independent
random variables. Then proceed to Ventcell-Freidlin theory of perturbations
of dynamical systems. We will then go on to describe more complex
situations involving interacting particle systems and random walks
in random media. Finally we will explore certain large deviation
properties of random graphs and random matrices.

Sathyamangalam Ranga Iyengar Srinivasa Varadhan is an Indian-American
mathematician born 2 January 1940 in Madras (Chennai), Tamil Nadu,
India. He received his undergraduate degree in 1959 from Presidency
College, Madras, and his doctorate in 1963 from the Indian Statistical
Institute under Calyampudi R. Rao, who arranged for Andrey Kolmogorov
to be present at Varadhan's thesis defense. Since 1963, he has worked
at the Courant Institute of Mathematical Sciences at New York University,
where he is currently a professor.

Varadhan is known for his work with Daniel W. Stroock on diffusion
processes, for which he received the Steele Prize from the American
Mathematical Society in 1996, and for his work on large deviations
with M. D. Donsker, for which he was awarded the Abel Prize on 22
March 2007 by the Norwegian Academy of Science and Letters. In 2008,
the government of India awarded him with the Padma Bhushan.

**Awards **

Padma Bhushan (2008)

Abel Prize (2007)

Steele Prize (1996)

Birkhoff Prize (1994)

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