© <2020>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/ licenses/by-nc-nd/4.0/
 
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.