Apparently, this user prefers to keep an air of mystery about them.
12 When is the closed unit ball in a smaller Banach space closed in a larger Banach space? Nov 22 '15
11 Quotients of $\ell_\infty$ by separable subspaces Nov 15 '13
9 Subspaces and quotients in Banach space theory Jun 12 '15
7 Existence of injective operators with dense range Feb 21 '14