M.González's user avatar
M.González's user avatar
M.González's user avatar
M.González
  • Member for 10 years, 7 months
  • Last seen this week
  • Santander, Spain
14 votes
1 answer
2k views

Quotients of $\ell_\infty$ by separable subspaces

7 votes
1 answer
1k views

Existence of injective operators with dense range

11 votes
1 answer
1k views

Bounded operator on a normed space with empty spectrum

9 votes
1 answer
1k views

Counterintuitive consequences of the Hahn-Banach theorem

12 votes
3 answers
1k views

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

8 votes
0 answers
988 views

On the classification of injective Banach spaces

11 votes
0 answers
586 views

Subspaces and quotients in Banach space theory

12 votes
2 answers
576 views

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

6 votes
0 answers
532 views

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

4 votes
0 answers
510 views

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

11 votes
1 answer
483 views

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

6 votes
2 answers
393 views

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

6 votes
1 answer
383 views

Reflexive subspaces of non-separable abstract $L_1$ spaces

8 votes
0 answers
355 views

Ultrapowers of Banach spaces without the continuum hypothesis

3 votes
2 answers
307 views

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

4 votes
0 answers
305 views

MOOC's courses on Functional analysis [closed]

1 vote
1 answer
293 views

Duality $(M/N)^*\equiv N^\perp/M^\perp$ for closed subspaces $N\subset M$ of a Banach space

1 vote
1 answer
291 views

The continuum hypothesis and the diamond principle for $\aleph_1$

1 vote
0 answers
284 views

$C^*$-algebras with non-trivial center

7 votes
0 answers
283 views

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

3 votes
2 answers
278 views

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

4 votes
1 answer
272 views

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

4 votes
0 answers
248 views

On the predual of the James tree space $\mathit{JT}$

2 votes
3 answers
241 views

Compact restrictions of the inclusion of $J:L_\infty(0,1)\to L_1(0,1)$

6 votes
1 answer
240 views

Finite representability of $\ell_p$ in subspaces of $L_p(0,1)$

4 votes
1 answer
236 views

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

9 votes
1 answer
231 views

On hereditarily reflexive Banach spaces

2 votes
1 answer
209 views

How to prove that the convolution operator associated to a discrete measure on a LCA group has natural spectrum?

2 votes
1 answer
209 views

Banach spaces locally having a basis

7 votes
1 answer
187 views

Self-dual Orlicz sequence spaces