On<i>w</i><sup>โ</sup>-sequential convergence and quasi-reflexivity
On<i>w</i><sup>โ</sup>-sequential convergence and quasi-reflexivity
This paper characterizes quasi-reflexive Banach spaces in terms of certain properties of the w*-sequential closure of subspaces.A real Banach space X is quasi-reflexive of order n, where n is a nonnegative integer, if and only if the canonical image J X X of X has algebraic codimension n in the โฆ