Wall-correspondence conjecture for orbifold Hilbert-scheme moduli

Let sHH0([E/Γ])s\in HH_0([E/\Gamma]), let SS be the deformation base, and let Mσ(v;OD)M_{\underline\sigma}(v;\mathcal O_{D_\infty}) be the relative moduli spaces associated to geometric relative stability conditions. Let N1(XR[n]/B)R,>0N^1(X_R^{[n]}/B)_{\mathbb R,>0} denote the relative divisor classes pairing positively with a curve in a generic fiber. Wall-correspondence conjecture. There is a nonempty subspace UStab(P[E/Γ](Ξ)/S)U\subset\operatorname{Stab}(\mathbb P_{[E/\Gamma]}(\Xi)/S) of geometric relative stability conditions and a surjective map

:UN1(XR[n]/B)R,>0\ell:U\longrightarrow N^1(X_R^{[n]}/B)_{\mathbb R,>0}

such that the corresponding families of moduli spaces are birational over SS for any two stability conditions in UU, and there is a bijection between walls in N1(XR[n]/B)R,>0N^1(X_R^{[n]}/B)_{\mathbb R,>0} inducing contractions, walls in HH0([E/Γ])HH_0([E/\Gamma]) where the contraction is not regular, and a subset of roots of RellR^{ell}. This predicts that the birational wall structure of the orbifold Hilbert schemes is controlled by deformation walls and elliptic-root-system roots; no resolution is supplied.

Sources & referencesView supporting material

Primary source

Samuel DeHority, “Toroidal analogues of the Grothendieck-Springer map”, arXiv:2311.00355 (2023).

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