Calogero–Moser and Harish–Chandra symplectic-leaf correspondence conjecture

Assume the unipotent-family and cuspidality conjectures for WW and all its parabolic subgroups. Fix a dd-cuspidal pair (P,λ)(P,\lambda) and let pp be the Calogero–Moser point corresponding to the Lusztig family of λ\lambda. Let SP,p\mathcal S_{P,p} be the associated symplectic leaf, and assume the relevant normalizer with λ\lambda equals the full normalizer.

Harish–Chandra compatibility conjecture. The maps from irreducible characters of the normalizer to Calogero–Moser fixed points, from those characters to unipotent representations via dd-Harish–Chandra theory, and from unipotent representations to fixed points via Φ\Phi^* form a commutative diagram:

ΦHCW,P,λ=ψfixzkP,p.\Phi^*\circ {\mathrm{H}}{\mathrm{C}}^{W,P,\lambda}=\psi_{\mathrm{fix}}\circ\mathfrak z_{k_{P,p}}.

This asserts compatibility between local Harish–Chandra parametrization and the global Calogero–Moser/unipotent correspondence. It is conditional on the preceding conjectures and remains open.

Sources & referencesView supporting material

Primary source

Cédric Bonnafé, “Calogero-Moser spaces vs unipotent representations”, arXiv:2112.13684 (2022).

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