Abstract
Let A be a separable simple C*-algebra. For each ;) on A such that π(a) has a non-trivial invariant subspace in Hπ.
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Zhang, L. Problem of invariant subspaces in C*-algebras. Sci. China Ser. A-Math. 45, 545–548 (2002). https://doi.org/10.1360/02ys9059
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DOI: https://doi.org/10.1360/02ys9059