fables
Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédenteProchaine révisionLes deux révisions suivantes | ||
fables [2020/03/31 13:04] – weronika | fables [2021/10/24 16:34] – kalinin0 | ||
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The normal starting time of this seminar is 16.30 on Monday. | The normal starting time of this seminar is 16.30 on Monday. | ||
+ | |||
+ | ---- | ||
+ | Nov 1, 16h15. Room 06-13 | ||
+ | | ||
+ | Vasily Golyshev (Moscow, Bures-sur-Yvette) Modularity proofs via | ||
+ | fibered motives. | ||
+ | |||
+ | This is a report on joint work with Don Zagier, and joint work | ||
+ | in progress with Kilian Bönisch and Albrecht Klemm. | ||
+ | |||
+ | The rigid Calabi-Yau threefolds that appear as conifold fibers | ||
+ | in the hypergeometric Landau-Ginzburg models of Fano | ||
+ | complete intersection fourfolds in [weighted] projective spaces | ||
+ | are expected to be modular, but what is lacking is the | ||
+ | construction of actual correspondences with Kuga-Sato | ||
+ | threefolds. I will explain how the technique of fibered motives | ||
+ | can be used to provide `opportunistic' | ||
+ | proofs for such fibers. | ||
+ | ---- | ||
+ | |||
+ | 2020, Wednesday, May 20, 16:00 (CEST), Virtual seminar, Lionel Lang (Stockholm University) | ||
+ | | ||
+ | https:// | ||
+ | Meeting ID: 592 872 9514 Password: (the number of lines on a cubic surface) | ||
+ | | ||
+ | **Co-amoebas, | ||
+ | |||
+ | In this joint work in progress with J. Forsgård, we study the topology of maps P:(\C*)^2 \to \C given by Laurent polynomials P(z, | ||
+ | For specific P, we observed that the topology of the corresponding map can be described in terms of the co-amoeba of a generic fiber. When the latter co-amoeba is maximal, it contains a dimer (a particularly nice graph) whose fundamental cycles corresponds to the vanishing cycles of the map P. For general P, the existence of maximal co-amoebas is widely open. In the meantime, we can bypass co-amoebas, going directly to dimers using a construction of Goncharov-Kenyon and obtain a virtual correspondence between fundamental cycles and vanishing cycles. | ||
+ | In this talk, we will discuss how this (virtual) correspondence can be used to compute the monodromy of the map P. | ||
+ | |||
+ | ---- | ||
+ | |||
+ | |||
+ | 2020, Tuesday, April 7, 17:00, Virtual seminar (EDGE seminar) Grigory Mikhalkin (Geneva) | ||
+ | | ||
+ | https:// | ||
+ | Meeting ID: 870 554 816 Password: 014504 | ||
+ | |||
+ | **Area in real K3-surfaces** | ||
+ | |||
+ | Real locus of a K3-surfaces is a multicomponent topological surface. The canonical class provides an area form on these components (well defined up to multiplication by a scalar). In the talk we'll explore inequalities on total areas of different components as well a link between such inequalities and a class of real algebraic curves called simple Harnack curves. Based on a joint work with Ilia Itenberg. | ||
+ | |||
+ | ---- | ||
2020, Monday, March 31, 17:00, Virtual seminar, Vladimir Fock (Strasbourg) | 2020, Monday, March 31, 17:00, Virtual seminar, Vladimir Fock (Strasbourg) | ||
Ligne 20: | Ligne 64: | ||
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- | 2020, Monday, March 16, 16:30, Battelle, Alexander Veselov (Loughborough University)[POSTPONED | + | 2020, Monday, March 16, 16:30, Battelle, Alexander Veselov (Loughborough University)[POSTPONED] |
**On integrability, | **On integrability, |
fables.txt · Dernière modification : 2023/12/05 11:54 de slavitya_gmail.com