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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
In this note, we give first that a characterization of super weakly compact convex sets of a Banach space $X$, namely, a sufficient and necessary condition for a closed bounded convex set $Ksubset X$ to be super weakly compact is that there exists a $w^*$ lower semicontinuous seminorm $p$ with $pgeqsigma_Kequivsup_{xin K}langlecdot,x
angle$ such that $p^2$ is uniformly Fr'echet differentiable on each bounded set of $X^*$; and show then a representation theorem for the dual of the semigroup ${
m swcc}(X)$ consisting of all the nonempty super weakly compact convex sets of the space $X$.