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Statements
1982
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nilpotent operators
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algebraic operators
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polynomially compact operators
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triangular, quasitriangular and biquasitriangular operators
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cyclic and multicyclic operators
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semi-Fredholm operators
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invariant under similarities
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similarity invariants
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compact perturbations
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quotient Calkin algebra
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Riesz-Dunford functional calculus
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stability properties of semi-Fredholm operator
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triangular representation
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Brown-Douglas- Fillmore theorem
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similarity orbit of a normal operator with perfect spectrum
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spectral characterization of quasitriangularity
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