Almost limited sets in Banach lattices
2014
Abstract We introduce and study the class of almost limited sets in Banach lattices, that is, sets on which every disjoint weak ⁎ null sequence of functionals converges uniformly to zero. It is established that a Banach lattice has order continuous norm if and only if almost limited sets and L -weakly compact sets coincide. In particular, in terms of almost Dunford–Pettis operators into c 0 , we give an operator characterization of those σ -Dedekind complete Banach lattices whose relatively weakly compact sets are almost limited, that is, for a σ -Dedekind Banach lattice E , every relatively weakly compact set in E is almost limited if and only if every continuous linear operator T : E → c 0 is an almost Dunford–Pettis operator.
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