Block-theoretic analogue of Glauberman's Z* theorem

Let GG be a group, let ee be a block of the group algebra OG \mathcal O G, and let (P,eP)(P,e_P) be an ee-subpair of GG. Let (D,eD)(D,e_D) be a maximal ee-subpair containing (P,eP)(P,e_P), and suppose that CG(P)C_G(P) controls the ee-fusion in GG with respect to (D,eD)(D,e_D). Block-theoretic Z conjecture.* There exists a Morita equivalence between the block algebras

OGeandOCG(P)eP.\mathcal O G e \quad\text{and}\quad \mathcal O C_G(P)e_P.

This conjecture is a block-theoretic analogue of Glauberman's ZZ^*-theorem. It would strengthen the stable equivalence obtained from strong fusion control to a Morita equivalence, but the supplied source does not state whether it has been resolved.

Sources & referencesView supporting material

Primary source

Erwan Biland, “Strong fusion control and stable equivalences”, arXiv:1308.5477 (2013).

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