Seminar series
Date
Tue, 11 Mar 2014
Time
14:00 -
15:00
Location
L4
Speaker
Ben Davison
Organisation
EPFL Lausanne
The cohomological Hall algebra of vanishing cycles associated to a quiver with potential is a categorification of the refined DT invariants associated to the same data, and also a very powerful tool for calculating them and proving positivity and integrality conjectures. This becomes especially true if the quiver with potential is "self dual" in a sense to be defined in the talk. After defining and giving a general introduction to the relevant background, I will discuss the main theorem regarding such CoHAs: they are free supercommutative.