M.González's user avatar
M.González's user avatar
M.González's user avatar
M.González
  • Member for 9 years, 5 months
  • Last seen this week
  • Santander, Spain
14 votes
1 answer
1k views

Quotients of $\ell_\infty$ by separable subspaces

12 votes
2 answers
536 views

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

12 votes
3 answers
911 views

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

11 votes
1 answer
437 views

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

11 votes
1 answer
1k views

Bounded operator on a normed space with empty spectrum

11 votes
0 answers
543 views

Subspaces and quotients in Banach space theory

9 votes
1 answer
1k views

Counterintuitive consequences of the Hahn-Banach theorem

9 votes
1 answer
207 views

On hereditarily reflexive Banach spaces

8 votes
0 answers
346 views

Ultrapowers of Banach spaces without the continuum hypothesis

8 votes
0 answers
862 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
275 views

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

7 votes
1 answer
177 views

Self-dual Orlicz sequence spaces

6 votes
1 answer
352 views

Reflexive subspaces of non-separable abstract $L_1$ spaces

6 votes
0 answers
173 views

Ultrapowers and complemented subspaces

6 votes
0 answers
530 views

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

6 votes
1 answer
175 views

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

5 votes
2 answers
355 views

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

5 votes
1 answer
106 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
160 views

Subprojective Orlicz sequence spaces

4 votes
1 answer
140 views

The complement of $L_1(0,1)$ in $L_1(0,1)^{**}$

4 votes
0 answers
56 views

The embedding of a Banach lattice in an ultrapower

4 votes
0 answers
436 views

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

4 votes
0 answers
159 views

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

3 votes
1 answer
262 views

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

3 votes
1 answer
93 views

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

3 votes
2 answers
290 views

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

3 votes
2 answers
267 views

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

3 votes
0 answers
248 views

MOOC's courses on Functional analysis [closed]