List questions from operator-algebras

Published on 13 Apr 2026 - 11:41

123

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Unital $C^\ast$-algebra $\mathcal{A}$ with positive elements $\mathcal{A}$.

Published on 13 Apr 2026 - 1:39

94

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Self-adjoint elements $A_1$ and $A_2$ in a $C^\ast$-algebra

Published on 13 Apr 2026 - 1:39

91

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$B$ is unitary if and only if $\sigma(B)\subseteq S^1$.

Published on 25 Nov 2022 - 13:43

75

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Self-adjoint elements that commutes and positive

Published on 13 Apr 2026 - 3:25

57

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$a \le \|a\|$ in a von Neumann algebra

Published on 11 Apr 2026 - 10:40

29

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The norm equality on $L^2(M)$

Published on 12 Apr 2026 - 17:35

169

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Closed sets under norm topology and strong operator topology

Published on 12 Apr 2026 - 10:58

216

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Quasi-equivalent and Equivalent Representations of C* Algebras

Published on 06 Dec 2022 - 7:42

61

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Conditionally negative definite functions on free groups

Published on 12 Apr 2026 - 3:43

73

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Reference for modular theory on $B(H)$

Published on 12 Apr 2026 - 22:44

94

Views

Can every group action be represented as a conjugation by unitaries?

Published on 13 Apr 2026 - 5:13

58

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Relation between support projections of two positive normal linear functionals in a von Neumann Algebra

Published on 12 Apr 2026 - 12:44

118

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If $0 \leq A \leq B$ and $A$ and $B$ commute, then $A^n \leq B^n$

Published on 08 Dec 2022 - 23:03

65

Views

Basis-free definition of trace class operators?

Published on 12 Apr 2026 - 10:44

List Question

Incomparability of ultraweak and strong topologies

Unital $C^\ast$-algebra $\mathcal{A}$ with positive elements $\mathcal{A}$.

Self-adjoint elements $A_1$ and $A_2$ in a $C^\ast$-algebra

$B$ is unitary if and only if $\sigma(B)\subseteq S^1$.

Self-adjoint elements that commutes and positive

$a \le \|a\|$ in a von Neumann algebra

The norm equality on $L^2(M)$

Closed sets under norm topology and strong operator topology

Quasi-equivalent and Equivalent Representations of C* Algebras

Conditionally negative definite functions on free groups

Reference for modular theory on $B(H)$

Can every group action be represented as a conjugation by unitaries?

Relation between support projections of two positive normal linear functionals in a von Neumann Algebra

If $0 \leq A \leq B$ and $A$ and $B$ commute, then $A^n \leq B^n$

Basis-free definition of trace class operators?

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