Counting maps with prescribed incidence conditions
ALGEBRAIC GEOMETRY & NUMBER THEORY SEMINAR
Date:
Wednesday, May 25, 2022 14:00 - 16:00
Speaker:
Gavril Farkas (Humboldt-Universität zu Berlin)
Location:
Heinzel Seminar Room (I21.EG.101), Office Building West
Series:
Mathematics and CS Seminar
Host:
Tamas Hausel
Contact:
Birgit Oosthuizen-Noczil
The question of computing the number of maps of fixed degree d from a curve to a target variety X and verifying n incidence conditions can be viewed as a counterpart of the problem of determining the Gromov-Witten invariants of X. Using degeneration and Schubert calculus, we solve this problem when the target variety is the projective space of dimension r, and determine these numbers completely for linear series of arbitrary dimension when d is sufficiently large. Our formulas generalize recent results of Tevelev and of Cela-Pandharipande-Schmitt.
Joint work with C. Lian.