If $T$ is an operator on a Hilbert space $\mathscr{H}$, this paper gives necessary and sufficient conditions on $T$ such that $C^\ast(T)$, the $C^\ast$-algebra ...
Proceedings of the American Mathematical Society, Vol. 37, No. 1 (Jan., 1973), pp. 121-127 (7 pages) A composition operator is a linear operator induced on a subspace of KX by a point transformation φ ...
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