The center conjecture for finite W-superalgebras

Let g\mathfrak{g} be the Lie superalgebra and ee the nilpotent element defining the finite WW-superalgebra U(g,e)U(\mathfrak{g},e). Let Z(U(g))Z(U(\mathfrak{g})) and Z(U(g,e))Z(U(\mathfrak{g},e)) denote the centers of U(g)U(\mathfrak{g}) and U(g,e)U(\mathfrak{g},e), respectively, and let

Pr:Z(U(g))Z(U(g,e))\operatorname{Pr}:Z(U(\mathfrak{g}))\longrightarrow Z(U(\mathfrak{g},e))

be the projection induced by U(g)U(g)/IχU(\mathfrak{g})\twoheadrightarrow U(\mathfrak{g})/I_\chi. Center conjecture. The center of U(g,e)U(\mathfrak{g},e) coincides with the image of Z(U(g))Z(U(\mathfrak{g})) under Pr\operatorname{Pr}:

Z(U(g,e))=Pr(Z(U(g))).Z(U(\mathfrak{g},e))=\operatorname{Pr}\bigl(Z(U(\mathfrak{g}))\bigr).

For complex semisimple Lie algebras, the analogous projection is known to be an algebra isomorphism; the conjecture asks for the corresponding equality of centers in the finite W-superalgebra setting.

Sources & referencesView supporting material

Primary source

Yang Zeng and Bin Shu, “Highest weight theory for minimal finite W-superalgebras and related Whittaker categories”, arXiv:2209.00921 (2025).

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