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Mathematics Colloquium


Date:  Tuesday, December 05, 2006

Title:  Topological epsilon-factors

Abstract:  A key property of arithmetic L-functions (that lies at the heart of the Langlands reciprocity) is factorization of the constants in the functional equation into a product of local epsilon-factors. In this talk I will explain a parallel topological construction which provides an epsilon factorization of the determinant of the cohomology of a constructible sheaf. It can be viewed as an "animation" of the classical Dubson-Kashiwara formula for the Euler characteristics.

Speaker:  Alexander Beilinson
Institution:  Chicago


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