For more information about this meeting, contact Sergei Tabachnikov.
|Title:||Tropical Welschinger invariants|
|Seminar:||Department of Mathematics Colloquium|
|Speaker:||Ilia Itenberg, University of Strasbourg and MSRI|
|Welschinger invariants are designed to bound from below the number of real rational curves which pass through a given real generic collection of points on a real rational surface. In some cases (for example, for the projective plane) these invariants can be calculated using Mikhalkin's approach which deals with a corresponding count of tropical curves.
We will present the basic notions of tropical geometry and, using the tropical approach, will establish a logarithmic equivalence of Welschinger and Gromov-Witten invariants in several situations.|
Room Reservation Information
|Date:||09 / 03 / 2009|
|Time:||04:00pm - 05:00pm|