If two Banach spaces have isomorphic duals, must they be isomorphic?
125982
If the dual spaces are isometrically isomorphic are the spaces isomorphic?
43826
Example to prove that $ C^1[0,1] $ is not a Banach space for the uniform norm?
69384
Are the following modules free and/or isomorphic?
144112
Show that $c_0$ is a Banach space with the norm $\rVert \cdot \lVert_\infty$
34173
Banach spaces and their unit sphere
128266
Dual Spaces and Natural maps
47031
Isometric to Dual implies Hilbertable?
97608
Showing a Ring of endomorphisms is isomorphic to a Ring
102079
If $1\leq p < \infty$ then show that $L^p([0,1])$ and $\ell_p$ are not topologically isomorphic
28731
Banach space in functional analysis
156855
separable Banach space with Banach-Mazur distances to $\ell_2^n$ bounded must be isomorphic to $\ell_2$?
117476
Isometries between dual factor space and annihilator
79734
Is every sub-lattice of $\mathcal P(X)$ isomorphic to a sub-lattice of $\mathcal P(X')$ containing singleton sets?
102371
Proving that two vector spaces of equal dimension are isomorphic
82355
When is the image of a linear operator (between Banach spaces) closed?
145222
The dual of subspace of a normed space is a quotient of dual: $X' / U^\perp \cong U'$
99938
Is the conjugation map always an isomorphism?