List questions from operator-algebras

Published on 06 Apr 2026 - 23:34

154

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

Published on 06 Apr 2026 - 23:36

50

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Extension of some operator formula

Published on 06 Apr 2026 - 13:32

149

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

Published on 29 Mar 2026 - 4:44

150

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A comparison between strength of WOT and SOT topology in $B(H)$

Published on 22 Sep 2017 - 10:55

50

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Is $F$ an isometry between $l^1(\mathbb(N))$ and $C(D)$?

Published on 31 Mar 2026 - 3:28

78

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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 06 Apr 2026 - 23:38

65

Views

Tensoring a Hilbert Space by a Finite Dimensional Hilbert Space

Published on 30 Sep 2017 - 13:06

151

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Divergence of a series involving an operator

Published on 05 Oct 2017 - 3:37

298

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

Published on 06 Apr 2026 - 23:34

359

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Unitary operator as an infinitesimal transformation

Published on 29 Mar 2026 - 11:01

139

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Fredholm operators, rank, and closure

Published on 28 Mar 2026 - 13:37

89

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

Published on 06 Apr 2026 - 23:36

73

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When does a complex unital *-algebra have a faithful representation on a pre-Hilbert space?

Published on 11 Oct 2017 - 19:37

195

Views

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

Published on 06 Apr 2026 - 23:36

List Question

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

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

Extension of some operator formula

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

A comparison between strength of WOT and SOT topology in $B(H)$

Is $F$ an isometry between $l^1(\mathbb(N))$ and $C(D)$?

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

Tensoring a Hilbert Space by a Finite Dimensional Hilbert Space

Divergence of a series involving an operator

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

Unitary operator as an infinitesimal transformation

Fredholm operators, rank, and closure

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

When does a complex unital *-algebra have a faithful representation on a pre-Hilbert space?

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

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