This is a preview. Log in through your library . Abstract We determine the invariant subspaces M of L2(T2) for which there is a subspace S of M and a positive integer ...
Journal of Operator Theory, Vol. 53, No. 1 (Winter 2005), pp. 197-220 (24 pages) It is known that if AB – BA is quasinilpotent for every A and B in a multiplicative semigroup 𝒮 of compact operators ...
Algebraic structures are fundamental mathematical entities defined by sets equipped with operations that satisfy specific axioms, such as groups, rings, and fields. Function spaces, by contrast, are ...
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