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math.FA2002
Weak* sequential closures in Banach space theory and their applications
M. I. Ostrovskii
Let X be a Banach space. Given a subset A of the dual space X* denote by the weak* sequential closure of A, i.e., the set of all limits of weak*-convergent sequences in A…
math.FA2002
Projections in normed linear spaces and sufficient enlargements
M. I. Ostrovskii
Definition. A symmetric with respect to 0 bounded closed convex set A in a finite dimensional normed space X is called a sufficient enlargement for X (or of B(X)) if for arbitrary…
math.FA2002
Hahn-Banach operators
M. I. Ostrovskii
We consider real spaces only. Definition. An operator between Banach spaces and is called a Hahn-Banach operator if for every isometric embedding of the space $X…