PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

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

Room Number:MB114
Date:09 / 03 / 2009
Time:04:00pm - 05:00pm