Symplectic duality cohomology and fixed-point coordinate-ring conjecture

Let XX0X\to X_0 and X!X0!X^!\to X_0^! be symplectic dual conical symplectic resolutions, and let a torus T\mathbb{T} act on X0!X_0^!. Denote by H(X)H^*(X) the cohomology of XX and by the coordinate ring of T\mathbb{T}-fixed points in X0!X_0^! the corresponding graded algebra. Symplectic duality conjecture. The cohomology H(X)H^*(X) and the coordinate ring of T\mathbb{T}-fixed points in X0!X_0^! are isomorphic as graded algebras, and vice versa. This predicts a relation between the topology of one member of a symplectic-dual pair and the fixed-point coordinate ring of the other. In the cases numbered (1), (4), and (5), the conjecture has been proved by Hikita; the analogous assertion in the opposite direction is included in the statement.

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Primary source

Kohei Hatano, “The cohomology of framed moduli spaces and the coordinate ring of torus fixed points of quotient singularities”, arXiv:2109.14655 (2021).

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