Is this normed linear space a Banach space?
67283
Is $L^{p}$ space with alternate norm Banach?
80618
Surjective bounded operator in Banach spaces without bounded right-inverse
97949
Existence of a $\mathbb C$-Banach space isometric to a Hilbert Space but whose norm is not induced by an inner product?
34173
Banach spaces and their unit sphere
134035
Can differential forms be generalized to (separable) Banach spaces?
125623
Subspaces of separable normed spaces
15839
equivalent norms in Banach spaces of infinite dimension
124458
Quotient of a Banach space $X$ gets quotient topology under standard norm induced from $X$.
82355
When is the image of a linear operator (between Banach spaces) closed?
134136
Does weak convergence imply $L^2$-norm convergence?
156855
separable Banach space with Banach-Mazur distances to $\ell_2^n$ bounded must be isomorphic to $\ell_2$?
59697
Is the boundary of the unit sphere in every normed vector space compact?
158082
Is $\|A^n\|=\|A\|^n$ true for any normal operator in a Hilbert space?
154762
Dual space of a finite dimensional normed space
57609
Hahn-Banach proof by extension of basis
17336
Least norm in convex set in Banach space
134492
Proving that a Hölder space is a Banach space