Weightless functions and invariant distributions conjecture

Let GG be a pp-adic group, let KH(G)\mathcal K\subset\mathcal H(G) be the space of weightless functions, let EDG\mathcal E\subset\mathcal D^G be the distinguished space of invariant generalized functions, and let K(Ω)\mathcal K(\Omega) denote the corresponding subspace for a closed conjugation-invariant subset Ω\Omega. For fKf\in\mathcal K, let f^\widehat f be its conjugation average and let τ:H0(G,K)DG\tau:H_0(G,\mathcal K)\to\mathcal D^G be the induced map. Weightless functions and invariant distributions conjecture. The following assertions hold: f^E\widehat f\in\mathcal E for every fKf\in\mathcal K; τ\tau is an isomorphism

H0(G,K)E;H_0(G,\mathcal K)\cong\mathcal E;

and

dimH0(G,K(Ω))=1\dim H_0(G,\mathcal K(\Omega))=1

for every regular semisimple conjugacy class ΩG\Omega\subset G. These assertions identify the averaged weightless functions with the relevant invariant distributions and prescribe one-dimensional contributions from regular semisimple conjugacy classes; the supplied text gives no evidence of resolution.

Sources & referencesView supporting material

Primary source

Roman Bezrukavnikov and David Kazhdan, “Character values and Hochschild homology”, arXiv:1803.09442 (2018).

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