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 [2020/03/09 15:33] – weronika | fables [2021/10/28 22:32] – kalinin0 | ||
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Ligne 4: | Ligne 4: | ||
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) | ||
+ | |||
+ | |||
+ | **Markov numbers in number theory, topology, algebraic geometry, and differential equations** | ||
+ | |||
+ | I will explain how the Markov numbers arise in different mathematical | ||
+ | disciplines, | ||
+ | |||
+ | ---- | ||
+ | |||
+ | 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,w). | ||
+ | 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. | ||
+ | |||
+ | ---- | ||
+ | |||
+ | | ||
+ | |||
+ | https:// | ||
+ | Meeting ID: 737 573 471 | ||
| | ||
- | **Beauville--Bogomolov decomposition in characteristic p>0** | + | **Higher measured laminations and tropical curves** |
- | The classical Beauville--Bogomolov decomposition is a structural result concerning complex varieties with trivial first Chern class. | + | We shall define a notion of a higher lamination |
+ | into a Riemann surface with edges coloured by generators | ||
+ | Weyl group. This notion generalises | ||
+ | integral measured lamination | ||
+ | curve and can be constructed out of a integral Lagrangian submanifold | ||
+ | of the cotangent bundle. | ||
---- | ---- | ||
- | 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