Extension of the parabolic Calogero–Moser results to all compositions

Let α=(α1,,α)\alpha=(\alpha_1,\dotsc,\alpha_{\ell}) be a composition, and let CnC_n denote the parabolic Calogero–Moser variety associated with α\alpha. The results established under the hypothesis 5\ell\leq 5 include the complete-intersection theorem for the partial Grothendieck–Springer resolution, the description of irreducible components, and the smoothness, irreducibility, and dimension theorem for CnC_n.

Extension conjecture. Theorem~, Theorem~, and Theorem~ hold for all compositions α\alpha.

This conjecture asserts that the restriction to at most five blocks is only a limitation of the methods used, particularly the reliance on the cited block-vector theorem. It would extend Nevins's conjecture from the considered parabolic subgroups to all parabolic subgroups.

Sources & referencesView supporting material

Primary source

Mee Seong Im and Travis Scrimshaw, “The regularity of almost-commuting partial Grothendieck–Springer resolutions and parabolic analogs of Calogero–Moser varieties”, arXiv:1812.02283 (2020).

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