NTS Fall 2013/Abstracts
Contents
September 5
Guillermo Mantilla-Soler (EPFL) |
Title: The spinor genus of the integral trace and local arithmetic equivalence |
Abstract: In this talk I'll explain my recent results on the spinor genus of the integral trace form of a number field. I'll show how from them one can decide in terms of finitely many ramification invariants, and under some restrictions, whether or not a pair of number fields have isometric integral trace forms. Inspired by the work of R. Perlis on number fields with the same zeta function I'll define the notion of local arithmetic equivalence, and I'll show that under certain hypothesis this equivalence determines the local root numbers of the number field, and the isometry class of integral trace form. |
September 12
Simon Marshall (Northwestern) |
Title: Endoscopy and cohomology growth on U(3) |
Abstract: I will use the endoscopic classification of automorphic forms on U(3) to determine the asymptotic cohomology growth of families of complex-hyperbolic 2-manifolds. |
September 19
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September 26
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October 3
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October 10
Bogdan Petrenko (Eastern Illinois University) |
Title: Generating an algebra from the probabilistic standpoint |
Abstract: Let A be a ring whose additive group is free Abelian of finite rank. The topic of this talk is the following question: what is the probability that several random elements of A generate it as a ring? After making this question precise, I will show that it has an interesting answer which can be interpreted as a local-global principle. Some applications will be discussed. This talk will be based on my joint work with Rostyslav Kravchenko (University of Chicago) and Marcin Mazur (Binghamton University). |
October 17
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October 24
Paul Garrett (Minnesota) |
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October 31
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November 7
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November 14
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November 21
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December 5
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December 12
Vivek Shende (Berkeley) |
Title: Equidistribution on the space of rank two vector bundles over the projective line |
Abstract: I will discuss how the algebraic geometry of hyperelliptic curves gives an approach to a function field analogue of the `mixing conjecture' of Michel and Venkatesh. (For a rather longer abstract, see the arxiv posting of the same name as the talk) This talk presents joint work with Jacob Tsimerman. |
Organizer contact information
Sean Rostami
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