Скачать или смотреть Conifold Transitions and modularity of DT invariants on Nodal fibrations

Artan Sheshmani (QGM Aarhus and CMSA Harvard) speaks on conifold transitions and modularity of DT invariants on nodal fibrations for the Special Lecture Series on Donaldson-Thomas and Gromov-Witten Theories at the Center of Mathematical Sciences and Applications.

Abstract: Following lectures I and II we continue the discussion on the moduli space of shaves with two dimensional support on K3-fibered threefolds, which can admit finitely many nodal (rational double point singularity at worst) fibers. We will use the conifold transitions and degeneration techniques in this case to relate the geometry of our moduli space and its enumerative invariants to the ones studied in lectures I, II over smooth K3-fibrations.