Dirac cohomology conjecture for irreducible rational Cherednik algebra modules

Let WW be the reflection group, let h\mathfrak{h} be its reflection representation, let W~\widetilde{W} be the associated pin double cover, and let χ\chi be the spin module character. For an irreducible module L(σ)L(\sigma), write H(h,L(σ))H^{\bullet}(\mathfrak{h}^*,L(\sigma)) and H(h,L(σ))H_{\bullet}(\mathfrak{h},L(\sigma)) for the corresponding cohomology and homology, and let HD(L(σ))H_D(L(\sigma)) denote its Dirac cohomology. Dirac cohomology conjecture. For any irreducible module L(σ)L(\sigma), there are W~\widetilde{W}-module isomorphisms

HD(L(σ))H(h,L(σ))χH(h,L(σ))χ.H_D(L(\sigma)) \cong H^{\bullet}(\mathfrak{h}^*,L(\sigma)) \otimes \chi \cong H_{\bullet}(\mathfrak{h},L(\sigma))\otimes \chi.

The preceding argument proves the corresponding assertion under the hypotheses of the theorem in the paper; the statement is presented as the section's concluding claim, and its general resolution is not supplied here.

Sources & referencesView supporting material

Primary source

Jing-Song Huang and Kayue Daniel Wong, “A Casselman-Osborne theorem for rational Cherednik algebras”, arXiv:1511.07965 (2017).

Additional references

2 papers in this index state this conjecture (2011–2015). The statement above is taken from the most recent of them; the others are arXiv:1109.5064.

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