Seminari del Dipartimento di Matematica

Seminario del 2022

Mirror symmetry for generalized Kummer varieties

nel ciclo di seminari: SEMINARIO DI ALGEBRA E GEOMETRIA

algebra e geometria

The generalized Kummer variety K_n of an abelian surface A is the fibre of the natural map Hilb^{n+1}A->Sym^{n+1}A->A. Debarre described a Lagrangian fibration on K_n whose fibres are the kernels of JacC->A, where C are curves in a fixed linear system in A. In this talk we consider the dual of the Debarre system, constructed in a similar way to the duality between SL- and PGL-Hitchin systems described by Hausel and Thaddeus. We conjecture that these dual fibrations are mirror symmetric, in the sense that their (stringy) Hodge numbers are equal, and we verify this in a few cases. In fact, there is another isotrivial Lagrangian fibration on K_n. We can describe its dual fibration and verify the mirror symmetry relation in many more cases.