地点:数学高等研究院报告厅

时间: 5月27日，15:30 - 16:30

主讲人: Mattia Cavicchi (勃艮第大学)

摘要：When a motivic L-function L(M,s) vanishes at the central point of its functional equation, conjectures of Bloch and Beilinson predict the existence of a non-trivial extension of a suitable twist of the motive M by the unit motive. When M arises from certain Hecke characters of a quadratic imaginary imaginary field F, we will describe a construction of candidates for the Hodge realization of the predicted extensions, using the cohomology of Picard modular surfaces attached to F. This is joint work with Jitendra Bajpai.