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 ...
Shift-invariant spaces form a fundamental class of function spaces where elements can be represented as linear combinations of translates of one or more generating functions. This concept is pivotal ...
In a study published in Reports on Progress in Physics, research teams led by Academician GUO Guangcan and Prof. LIU Biheng ...
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