Event

Talk
Towards the Unified Symmetry
Prof. Dr. Sergey Galkin
13 Dec 2011, 17:30 – 18:30

Consider a finite group G of symplectic automorphisms of K3 surface S. Mukai have shown that representation of this group on cohomology of the surface is a pullback of the standard 24-dimensional representation of Mathieu group, and unfortunately group G should have 5-dimensional invariant subspace. On this example I am going to tackle the following question: how to redefine the notions of "symmetry" and "homology" in order to make the natural representation of symmetry on homology more irreducible? This is a joint with with Ludmil Katzarkov. We consider two mathematical extensions of the symmetry - to moduli spaces of sheaves and to derived categories. Some of our answers look arguably similar to the recent work of Gaberdiel, Hohenegger and Volpato that characterizes symmetries of super-conformal field theories