Every operator in the commutant
of a cyclic convolution operator [K.
g/[GAMMA]](G)}" which, by the results in [BC], [Tz], is the commutant
In  the first author and Silvestrov determine the centre of crossed products and in particular when crossed products are commutative; they also give a description of the commutant of A in A [[?
In Section 3, we describe the commutant of the coefficient ring in category crossed products.
Again, no relative commutant is algebraically generated by the standard generators, but it is reasonable to think that there is a relative commutant in the closure in the continuous case (where the closure is taken in the weak topology given by the G.
By imbedding the Hecke algebra quotient inside a much larger algebra, we may express the relative commutant as concrete elements, as well as phrase the question in terms that don't depend on the language of subfactors.
has atomic center and its relative commutant C [intersection] M is still diffuse.
i][parallel] [less than or equal to] [epsilon] for all i, is implied by two conditions: (i) the center Z(C) is atomic, and (ii) the relative commutant C' [interection] M is diffuse.
The aim of this article is to investigate the commutant of the operator [M.
We begin this section with a theorem about the commutant of the multiplication operator [M.
In this section we supply a new proof that the Browder spectrum of T is the largest part of [sigma](T) that remains unchanged under compact perturbations from the commutant
of T (proof of Theorem 1).
This is because the theory of composition operators links quite basic questions, such as the study of commutants
of multiplication operators and the theory of dynamical systems.