Number Theory Seminar

Date: March 7, 2018

Time: 1:15PM - 2:15PM

Location: BLOC 220

Speaker: Souvik Goswami, Texas A&M University

Title: Higher arithmetic Chow groups

Abstract: We give a new definition of higher arithmetic Chow groups for smooth projective varieties defined over a number field, which is similar to Gillet and Soulé's definition of arithmetic Chow groups. We also give a compact description of the intersection theory of such groups. A consequence of this theory is the definition of a height pairing between two higher algebraic cycles, of complementary dimensions, whose real regulator class is zero. This description agrees with Beilinson's height pairing for the classical arithmetic Chow groups. We also give examples of the higher arithmetic intersection pairing in dimension zero that, assuming a conjecture by Milnor on the independence of the values of the dilogarithm, are non zero. This is a joint work with José Ignacio Burgos-Gil from ICMAT, Spain.

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