Question

Definition: rng ideal versus algebra ideal in a non-unital $C^*$-algebra

score 287 · Answer 1 · 2026-03-25 11:14:56

287

Views

Definition: rng ideal versus algebra ideal in a non-unital $C^*$-algebra

Published on 25 Mar 2026 - 11:14

score 184 · Answer 2 · 2026-03-26 14:19:25

184

Views

Any reference concerning factorization of partial isometries in $B(H)$

Published on 26 Mar 2026 - 14:19

score 64 · Answer 3 · 2017-09-14 20:16:44

64

Views

Linear span of $\{\lambda_s: s\in \Gamma\}$ is dense in $C_{\lambda}^*(\Gamma)$

Published on 14 Sep 2017 - 20:16

score 153 · Answer 4 · 2017-09-17 15:16:47

153

Views

Closed balls in $B(H)$ are totally bounded?!

Published on 17 Sep 2017 - 15:16

score 149 · Answer 5 · 2026-03-29 04:44:07

149

Views

Concerning the Connectedness of Certain Unitaries in the Stabilization $\mathcal{K}A$ of a C$^{*}$-algebra $A$

Published on 29 Mar 2026 - 4:44

score 77 · Answer 6 · 2017-09-26 20:42:07

77

Views

Show that there exists $\xi_i \in l^2(\Gamma)$ with $\|\xi_i\|=1$ such that $\|\lambda_s \xi_i-\xi_i\| \to 0$

Published on 26 Sep 2017 - 20:42

score 44 · Answer 7 · 2026-03-30 04:22:15

44

Views

Every self-adjoint element of $c_0$ is a limit of sequence of linear combinations of orthogonal idempotents.

Published on 30 Mar 2026 - 4:22

score 100 · Answer 8 · 2026-03-31 01:47:39

100

Views

$\sigma(f)=f(\Omega)$ for $f\in C(\Omega)$, $\Omega$ a Compact, Hausdorff Topological Space

Published on 31 Mar 2026 - 1:47

score 297 · Answer 9 · 2017-10-06 16:11:49

297

Views

Proof that $ \sup \{ \|ax + \lambda x \|: x \in \mathcal A, \, \|x\| \leq 1 \} \geq |\lambda|$.

Published on 06 Oct 2017 - 16:11

score 88 · Answer 10 · 2017-10-08 20:22:44

88

Views

Finding a $C^*$-subalgebra of $B(H)$ for $c_0$?

Published on 08 Oct 2017 - 20:22

score 194 · Answer 11 · 2017-10-11 22:35:00

194

Views

how big is group C*-algebra of $\mathbb{R}^n$?

Published on 11 Oct 2017 - 22:35

score 146 · Answer 12 · 2026-03-31 06:00:53

146

Views

Homeomorphism between $\mathbb{S}^1$ and the spectrum of the Banach algebra of $2\pi$ periodic continuous functions

Published on 31 Mar 2026 - 6:00

score 118 · Answer 13 · 2026-03-29 04:48:18

118

Views

Connected Unitaries in $K_{1}(C(\mathbb{T}^{3}))$

Published on 29 Mar 2026 - 4:48

score 136 · Answer 14 · 2026-03-30 04:22:25

136

Views

The strong closure of closed, left ideals and hereditary C*-subalgebras

Published on 30 Mar 2026 - 4:22

score 72 · Answer 15 · 2026-03-26 06:23:10

72

Views

The reduced crossed product $A\rtimes_{\alpha,r}\Gamma$ doesn't depend on the choice of the faithful representation

Published on 26 Mar 2026 - 6:23

List Question

Definition: rng ideal versus algebra ideal in a non-unital $C^*$-algebra

Any reference concerning factorization of partial isometries in $B(H)$

Linear span of $\{\lambda_s: s\in \Gamma\}$ is dense in $C_{\lambda}^*(\Gamma)$

Closed balls in $B(H)$ are totally bounded?!

Concerning the Connectedness of Certain Unitaries in the Stabilization $\mathcal{K}A$ of a C$^{*}$-algebra $A$

Show that there exists $\xi_i \in l^2(\Gamma)$ with $\|\xi_i\|=1$ such that $\|\lambda_s \xi_i-\xi_i\| \to 0$

Every self-adjoint element of $c_0$ is a limit of sequence of linear combinations of orthogonal idempotents.

$\sigma(f)=f(\Omega)$ for $f\in C(\Omega)$, $\Omega$ a Compact, Hausdorff Topological Space

Proof that $ \sup \{ \|ax + \lambda x \|: x \in \mathcal A, \, \|x\| \leq 1 \} \geq |\lambda|$.

Finding a $C^*$-subalgebra of $B(H)$ for $c_0$?

how big is group C*-algebra of $\mathbb{R}^n$?

Homeomorphism between $\mathbb{S}^1$ and the spectrum of the Banach algebra of $2\pi$ periodic continuous functions

Connected Unitaries in $K_{1}(C(\mathbb{T}^{3}))$

The strong closure of closed, left ideals and hereditary C*-subalgebras

The reduced crossed product $A\rtimes_{\alpha,r}\Gamma$ doesn't depend on the choice of the faithful representation

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