On weak${}^{\ast }$-extensible subspaces of Banach spaces

G. Martínez-Cervantes, J. Rodríguez

Let $X$ be a Banach space and $Y\subseteq X$ be a closed subspace. We prove that if the quotient $X/Y$ is weakly Lindelöf determined or weak Asplund, then for every $w^{\ast }$-converge…