MATH Seminar
| Title: On a Question of Gross and McMullen |
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| Seminar: Algebra |
| Speaker: Eva Bayer Fluckinger of EPFL |
| Contact: David Zureick-Brown, dzb@mathcs.emory.edu |
| Date: 2018-10-16 at 4:00PM |
| Venue: MSC W301 |
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| Abstract: In a joint work with Lenny Taelman, we characterize the irreducible polynomials that occur as a characteristic polynomial of an isometry of an even, unimodular lattice with given signature, answering a question of Gross and McMullen. It turns out that the criteria are local ones, and that in the case of an irreducible polynomial, one has a local-global principle. This is no longer true for reducible polynomials. The aim of the talk is to describe these results, and give to a criterion for the local-global principle to hold. |
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