The cohomology of framed moduli spaces and the coordinate ring of torus fixed points of quotient singularities

Abstract

If two conical symplectic resolutions $X\to X_0$ and $X^{!}\to X_0^{!}$ are symplectic dual, the cohomology ring $H^{\ast }(X)$ and the coordinate ring of ${\mathbb{C}}^{\ast }$-fixed points in $X_0^{!}$ are expected to be isomorphic as graded algebras. This statement is called Hikita conjecture and it is known that the conjecture holds for some cases. In this paper, we deal with the cohomology of framed moduli spaces over the projective plane and the coordinate ring of ${\mathbb{C}}^{\ast }$- fixed points of ${\mathbb{C}}^{2n}/((\mathbb{Z}/r\mathbb{Z})\wr S_n)$ and show that these are isomorphic as graded vector spaces.

14 pages