Characterizations of series in Banach spaces.
On convexity, smoothness and renormings in the study of faces of the unit ball of a Banach space.
On the convergence and unconditional convergence of series of operators on Banach spaces.
We study Kalton's theorem on the unconditional convergence of series of compact operators and we use some matrix techniques to obtain sufficient conditions, weaker than the previous one, on the convergence and unconditional convergence of series of compact operators.
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