A Banach space isomorphic to his dual is an Hilbert space?
47031
Isometric to Dual implies Hilbertable?
92497
Isometric Embedding of a separable Banach Space into $\ell^{\infty}$
97391
Prove that $(C^1[0,1], \|\cdot\|)$ is not a Banach space
118323
What is the topological dual of a dual space with the weak* topology?
16692
a representation condition of Hilbert space
137067
For Banach space there is a compact topological space so that the Banach space is isometrically isomorphic with a closed subspace of $C(X)$.
50946
Separable Hilbert space have a countable orthonormal basis
8314
I am trying to find a Banach Space X and a singular operator (Infinite Dimensional Space)
44738
Compact operators on an infinite dimensional Banach space cannot be surjective
100257
Converse to Hilbert basis theorem
143517
Isomorphisms Between a Finite-Dimensional Vector Space and its Dual
109632
Show reflexive normed vector space is a Banach space
124458
Quotient of a Banach space $X$ gets quotient topology under standard norm induced from $X$.
151347
Why do operators belonging to different Hilbert spaces commute?
95887
How to show that quotient space $X/Y$ is complete when $X$ is Banach space, and $Y$ is a closed subspace of $X$?
62428
How to prove this inequality in Banach space?
129549
Showing that the orthogonal projection in a Hilbert space is compact iff the subspace is finite dimensional