Yemon Choi's user avatar
Yemon Choi's user avatar
Yemon Choi's user avatar
Yemon Choi
  • Member for 14 years, 5 months
  • Last seen this week
  • Lancaster, United Kingdom
7 votes

The sum (with multiplicity) of the cubes of irreducible character degrees of a finite group

6 votes

Comparison between the operator norm and the $L^1$ norm on group algebras

5 votes
Accepted

Do completely bounded maps on an operator space have a completely contractive Banach algebra structure?

4 votes

Relationship between noncommutative torus for different values of theta

7 votes
Accepted

Reference request for a preprint by Effros-Ruan

5 votes
Accepted

If $f(x,t)=\sum_{n \in \mathbb{Z}} a_n(t) e^{in x}$ is $C^\infty$ in $x$ and all $a_n(t)$ continuous, $x$ derivatives of $f$ are continuous in $t$?

7 votes
Accepted

When are finite-dimensional representations on Hilbert spaces completely reducible?

3 votes
Accepted

Hardy space inclusion in the right-half plane

6 votes
Accepted

Closed prime ideal in $C[0, 1]$

4 votes

Structure theorem for a class of idempotent monoids (where $xy = x$ or $xy = y$ for all $x, y$)

7 votes
Accepted

Is the matrix induced L1-norm greater than the induced L2-norm?

5 votes

Maximal ideals of the ring $\mathbb C \{T\}$

2 votes
Accepted

A reproducing kernel Hilbert space

1 vote
Accepted

Regarding basis of holomorphic Hardy space

1 vote

Finiteness of $\ell^2$-Betti numbers

3 votes
Accepted

Urysohn's lemma for Bochner functions?

2 votes

Prove that $(v^Tx)^2−(u^Tx)^2\leq \sqrt{1−(u^Tv)^2}$ for any unit vectors $u, v, x$

8 votes
Accepted

Density of matrix coefficients of unitary representations of a locally compact group

12 votes

Defects of Hamel bases for analysis in infinite dimensions

3 votes

When is the annihilator of the commutator subspace a complemented subspace?

1 vote

Understanding Kelley's intersection number (Boolean algebras)

8 votes

Is there a Banach algebra which $A^2$ is not dense in $A$ but $(A^{**})^2$ is dense in $A^{**}$?

11 votes
Accepted

Banach space with dual not a GT space

9 votes
Accepted

Are $\log(\sigma(A(z))$ subharmonic functions?

10 votes

Nonseparable counterexamples in analysis

5 votes
Accepted

Universal property of tensor products of bounded operators

3 votes
Accepted

Image of a complex disc by this function?

6 votes

Positive maps on finite group algebras and group homomorphisms

3 votes
Accepted

Coincidence of two topology on a bounded subset of a finite von Neumann algebra

2 votes
Accepted

$(ST)_{[13]}= S_{[13]}T_{[13]}$ for $S,T \in B(\mathcal{H}\otimes \mathcal{H}).$

1
2 3 4 5
12