Seminar in Real and Complex Geometry
Monday, 20.03.2017, 17:00-18:00,
building, room 102
Lev Blechman, Tel Aviv University
Refined descendant Gromov-Witten Invariants
In this talk we will first define refined tropical invariants (Following Block-Goettsche and
Goettsche-Schroeter) which are Laurent polynomials in one variable y, that under some some
appropriate conditions, for y=1 yield Gromov Witten invariants, and for y=-1 yield Welschinger
invariants of toric del Pezzo surfaces, that count complex, resp. real
plane tropical curves
passing through a generic configuration of points.
Then we will define a refinement of arbitrary rational tropical descendant invariants, that
count plane tropical curves that pass through a more generic configuration of points.
Joint work with E. Shustin.