The equivariant cohomological realization conjecture for local Dahmen–Micchelli modules

Let GG be the compact abelian group, with Lie algebra [?][?]; let XX be the finite list or configuration used to define the local Dahmen–Micchelli module DT(X)D_{\mathcal T}(X), and let MXTM_X^{\mathcal T} be the corresponding submanifold associated with a semilocal set T2X\mathcal T\subseteq 2^X. The cotangent bundle is taken in the equivariant sense, TGMXTT_G^*M_X^{\mathcal T}, and S[g]S[\mathfrak g^*] denotes the symmetric algebra on g\mathfrak g^*, with its natural grading. The set T\mathcal T is semilocal if it is closed under taking supersets and there exists a big cell Ω\Omega such that

L(X)TLΩ(X).L(X)\subseteq \mathcal T\subseteq L_\Omega(X).

Equivariant cohomological realization conjecture. For every semilocal T\mathcal T, there is an isomorphism of graded S[g]S[\mathfrak g^*]-modules

HG(TGMXT)DT(X)H_G^*(T_G^*M_X^{\mathcal T})\cong D_{\mathcal T}(X)

that is given by the infinitesimal index.

This is the cohomological analogue of the preceding theorem, which establishes the corresponding realization for the equivariant KK-theory module DMT(X)DM_{\mathcal T}(X). The authors indicate that analogous methods should prove the statement, but the conjecture itself is presented as an assertion whose proof is not supplied in the source.

Sources & referencesView supporting material

Primary source

Francesco Cavazzani and Luca Moci, “Geometric realizations and duality for Dahmen-Micchelli modules and De Concini-Procesi-Vergne modules”, arXiv:1303.0902 (2015).

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