Seminar in Real & Complex Geometry
Tuesday, 13.03.2012, 16:0017:30,
Schreiber
building, room 210
Eugenii Shustin,
Tel Aviv University
Welschinger invariants from an algebraic geometry point of view
Abstract
Welschinger invariants of real symplectic manifolds are equivalent to open
GromovWitten invariants. In the case of real del Pezzo surfaces they count
real rational curves in a given divisor class which pass through a generic
conjugationinvariant configuration of points. We give an algebraicgeometric
proof of the invariance both for the original and for modified Welschinger
numbers, and also extend the theory to a nondelPezzo case.
