Olivier Schiffmann (Université de Paris-Sud). Cohomological Hall algebras associated to curves. Friday 11th May, 1:30-2:30pm. Huxley 144.
Abstract: To any compact Riemann surface one can associate (at least) two kinds of cohomological Hall algebras: one whose underlying vector space is the (singular) cohomology of the moduli stack of vector bundles (or coherent sheaves) on X, and one whose underlying vector space is the (singular) cohomology of the moduli stack of Higgs bundles (or Higgs sheaves) on X. We will describe these algebras and give some applications and conjectures.
Yang-Hui He (City University of London). TBA. Friday 18th May, 1:30-2:30pm. Huxley 139.
Please note the unusual location:
Matteo Ruggiero (Université Paris 7). TBA. Friday 25th May, 1:30-2:30pm. BLKT 112 – Lecture Theatre 3.
No seminar on Friday 1st June due to this event.
Thomas Prince (University of Oxford). TBA. Friday 22nd June, 1:30-2:30pm. Huxley 139.