most citedThe perturbation classes problem for subprojective and superprojective Banach spaces

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math.FA2020★ 3 cited

The perturbation classes problem for subprojective and superprojective Banach spaces

Manuel González, Javier Pello, Margot Salas-Brown

We show that the perturbation class for the upper semi-Fredholm operators between two Banach spaces X and Y coincides with the strictly singular operators when X is subprojective a…