On Cohomology Rings of Non-Commutative Hilbert Schemes and CoHa-Modules

Abstract

We prove that Chow groups of certain non-commutative Hilbert schemes have a basis consisting of monomials in Chern classes of the universal bundle. Furthermore, we realize the cohomology of non-commutative Hilbert schemes as a module over the Cohomological Hall algebra.

arXiv comment28 pages. v2: Final version; to appear in Math. Res. Let. Improved exposition in subsection 2.2 (thanks to the referee), results in section 3 hold for an arbitrary framing datum n