Wintersemester 2018/19
Freitag, 10:30-11:30, Seminarraum 2 (Raum 204)
28.9.18 | BGHK Seminar in Köln |
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19.10.18 | BGHK Seminar in Bochum |
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26.10.18 | Julie Rowlett (Göteborg) Variational formulas for the Selberg zeta function and applications to curvature asymptotics Abstract: We will begin by introducing the Selberg zeta function and its relatives. Next, we introduce the geometric setting of our work: the Teichmüller space of Riemann surfaces of genus g. The focus of this talk is the behavior of the Selberg zeta function Z(s) as a function on Teichmüller space. We will deduce an explicit formula for the second variation of Z(s) via a certain infinite sum involving lengths of closed geodesics of the underlying surfaces. Our variational formula and its asymptotics have interesting implications for the curvature of the Hodge bundle and its relationship to the Quillen curvature. The talk is intended for a general mathematical audience; if any of the aforementioned notions are unfamiliar, questions are most welcome and explanations shall be happily provided! Based on joint work with K. Fedosova and G. Zhang. |
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23.11.18 | Joint Seminar on Complex Algebraic Geometry
and Complex Analysis in Bochum |
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7.12.18 | Tam Nguyen Phan (MPI Bonn) Topology of ends of nonpositively curved manifolds |
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14.12.18 | Grigori Avramidi (MPI Bonn) On isometry groups preserving multiple horospheres |
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18.1.19 | Joint Seminar on Complex Algebraic Geometry
and Complex Analysis in Essen |
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1.2.19 Hörsaal |
Andreas Ott (Heidelberg) Bounded cohomology in large degree Abstract: I will discuss recent progress on the computation of the continuous bounded cohomology of Lie groups in large degree. |
H. Geiges, 5.4.02