Regular irreducible inclusions B ⊂ A of simple unital C*-algebras with conditional expectation are canonically isomorphic to reduced twisted crossed products of B by its Weyl group via a unitary orthonormal generalized quasi-basis.
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Regular irreducible inclusions of simple $C^*$-algebras and crossed product structure
Regular irreducible inclusions B ⊂ A of simple unital C*-algebras with conditional expectation are canonically isomorphic to reduced twisted crossed products of B by its Weyl group via a unitary orthonormal generalized quasi-basis.