On quasi-complements
On quasi-complements
Results of H. P. Rosenthal and the author on w*-basic sequences are combined with known techniques and applied to quasi-complementation problems in Banach spaces.l Introduction* Recall that (closed, linear) subspaces Y, Z of the Banach space X are quasi-complements (respectively complements)Suppose that Y, Z are quasi-complements, but not complements, for …