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Journal of Mathematical Analysis and Applications, 2021, 497, 124857
Grothendieck Banach space
ℓ∞-Grothendieck subspace
A closed subspace S of l - is said to be a l -Grothendieck subspace if co c S (hence l -
c S**) and every [sigma] (S*, S)-convergent sequence in S* is [sigma](S*, l)-convergent.
Here we give examples of closed subspaces of l- containing co which are or fail to
be l -Grothendiec.