Mathematics – Functional Analysis
Scientific paper
2008-05-14
Houston Journal of Mathematics 36 (2010), 781-792
Mathematics
Functional Analysis
10 pages, no figures. Houston Journal of Mathematics (to appear)
Scientific paper
It is shown that if $A$ is an analytic class of separable Banach spaces with
separable dual, then the set $A^*=\{Y:\exists X\in A \text{with} Y\cong X^*\}$
is analytic. The corresponding result for pre-duals is false.
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