## On strictly cyclic algebras, $$P$$-algebras and reflexive operators.(English)Zbl 0253.46127

### MSC:

 47L10 Algebras of operators on Banach spaces and other topological linear spaces 47A15 Invariant subspaces of linear operators 47A25 Spectral sets of linear operators 47B20 Subnormal operators, hyponormal operators, etc.
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