Différences

Ci-dessous, les différences entre deux révisions de la page.

--- fables [2020/03/03 18:17] – weronika
+++ fables [2020/05/10 17:37] – weronika
@@ Ligne 5: / Ligne 5: @@
-, Monday, March 16, 16:30, Battelle, Alexander Veselov (Loughborough University)
+, Wednesday, May 20, 16:00 (CEST), Virtual seminar, Lionel Lang (Stockholm University)
+https://unige.zoom.us/j/5928729514
+Meeting ID: 592 872 9514  Password: (the number of lines on a cubic surface)
+**Co-amoebas, dimers and vanishing cycles**
+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.
+----
+, Tuesday, April 7, 17:00, Virtual seminar (EDGE seminar) Grigory Mikhalkin (Geneva)
+https://zoom.us/j/870554816?pwd=bERmR0ZQTitYNXJ1aFZLckxzeXZJZz09
+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.
+----
+, Monday, March 31, 17:00, Virtual seminar, Vladimir Fock (Strasbourg)
+https://unige.zoom.us/j/737573471
+Meeting ID: 737 573 471
+**Higher measured laminations and tropical curves**
+We shall define a notion of a higher lamination - a graph embedded
+into a Riemann surface with edges coloured by generators of an affine
+Weyl group. This notion generalises the notion of the ordinary
+integral measured lamination and on the other hand of a tropical
+curve and can be constructed out of a integral Lagrangian submanifold
+of the cotangent bundle.
+----
+, Monday, March 16, 16:30, Battelle, Alexander Veselov (Loughborough University)[POSTPONED]
 **On integrability, geometrization and knots**