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M.González
  • Member for 8 years, 8 months
  • Last seen this week
  • Santander, Spain
13 votes
1 answer
1k views

Quotients of $\ell_\infty$ by separable subspaces

12 votes
2 answers
519 views

Is there a Gelfand-Naimark-like characterization of group algebras $L_1(G)$?

11 votes
3 answers
831 views

Banach spaces $X$ with $\ell_2(X)$ not isomorphic to $L_2([0,1],X)$

11 votes
1 answer
426 views

Complemented subspaces in the dual of James' space $J$

9 votes
1 answer
198 views

On hereditarily reflexive Banach spaces

9 votes
1 answer
1k views

Counterintuitive consequences of the Hahn-Banach theorem

9 votes
1 answer
995 views

Bounded operator on a normed space with empty spectrum

9 votes
0 answers
532 views

Subspaces and quotients in Banach space theory

8 votes
0 answers
344 views

Ultrapowers of Banach spaces without the continuum hypothesis

8 votes
0 answers
797 views

On the classification of injective Banach spaces

7 votes
1 answer
1k views

Existence of injective operators with dense range

7 votes
0 answers
271 views

Complex interpolation of a Banach space and its antidual when the space has a basis

7 votes
1 answer
172 views

Self-dual Orlicz sequence spaces

6 votes
1 answer
342 views

Reflexive subspaces of non-separable abstract $L_1$ spaces

6 votes
0 answers
173 views

Ultrapowers and complemented subspaces

6 votes
0 answers
529 views

Products of spaces containing no copies of $\ell_2(\Gamma)$

6 votes
1 answer
172 views

Subsequences of an orthonormal basis generating a strongly embedded subspace in $L_2(0,1)$

5 votes
2 answers
341 views

Subspaces of $\ell_p$ ($1<p<\infty$, $p\neq 2$) not isomorphic to $\ell_p$

5 votes
1 answer
103 views

Simultaneous near-best approximation with respect to two norms

5 votes
0 answers
132 views

Banach spaces admitting no proper quasi-affinity

5 votes
2 answers
157 views

Subprojective Orlicz sequence spaces

4 votes
0 answers
366 views

$L_\infty(\mu)$ spaces non-isomorphic to a dual space

4 votes
0 answers
155 views

Is this property an isomorphic characterization of $\ell_1(\Gamma)$?

3 votes
1 answer
257 views

Copies of $c_0$ in $C[0,1]$ and disjoint sequences

3 votes
1 answer
88 views

G.L. l. u. st. for subspaces of Banach spaces with an unconditional basis

3 votes
2 answers
281 views

On the Lorentz sequence space $d(w,1)$

3 votes
2 answers
266 views

Operators on $\ell_\infty(\Gamma)$ and almost disjoint families of subsets

3 votes
1 answer
125 views

Does property (V) imply the Grothendieck property for dual Banach spaces?

3 votes
0 answers
207 views

MOOC's courses on Functional analysis [closed]

2 votes
0 answers
130 views

Birkhoff orthogonal of a Banach space in its bidual