List questions from operator-algebras

Published on 22 Mar 2026 - 15:44

121

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hyponormal operators

Published on 21 Mar 2026 - 19:21

95

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Cuntz-Krieger algebra as crossed product

Published on 21 Mar 2026 - 20:04

164

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Identifying $C(X\times X)$ with $C(X)\otimes C(X)$

Published on 24 Mar 2026 - 8:44

206

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If $A\in\mathcal{L}(E)$, why $\lim\limits_{n\to+\infty}\|A^n\|^{1/n}$ always exists?

Published on 19 Mar 2026 - 23:13

88

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Given two projections $p,q$ in a C$^{}$-algebra $E$, find all irreducible representations of $C^{}(p,q)$

Published on 22 Mar 2026 - 9:15

98

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projective and Haagerup tensor norms

Published on 22 Mar 2026 - 14:28

115

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AF-algebras and K-theory

Published on 22 Mar 2026 - 5:03

228

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How to show range of a projection is an eigenspace.

Published on 22 Mar 2026 - 10:36

74

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Is $\left\lVert f_U-f_V\right\rVert_{op}\leq \left\lVert U-V\right\rVert_2$ where $f_U = A\mapsto UAU^*$?

Published on 24 Mar 2026 - 10:58

128

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Spectral theorem for inductive limits of $C^*$-Algebras

Published on 24 Mar 2026 - 12:26

300

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Examples of unbounded approximate units in $C^*$-algebras

Published on 23 Mar 2026 - 23:15

39

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$\left [(A- \langle A \rangle ),\right (B- \langle B \rangle )]=\left [A,B \right ] $

Published on 22 Mar 2026 - 7:10

341

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Projections in C*-algebras

Published on 20 Mar 2026 - 11:14

89

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$a^{\dagger}a(a^{\dagger})^{n-1}+(a^{\dagger})^{n-1}=n(a^{\dagger})^{n-1}$

Published on 22 Mar 2026 - 4:00

List Question

Bijection between $\Delta(A)$ and $\mathrm{Max}(A)$

hyponormal operators

Cuntz-Krieger algebra as crossed product

Identifying $C(X\times X)$ with $C(X)\otimes C(X)$

If $A\in\mathcal{L}(E)$, why $\lim\limits_{n\to+\infty}\|A^n\|^{1/n}$ always exists?

Given two projections $p,q$ in a C$^{}$-algebra $E$, find all irreducible representations of $C^{}(p,q)$

projective and Haagerup tensor norms

AF-algebras and K-theory

How to show range of a projection is an eigenspace.

Is $\left\lVert f_U-f_V\right\rVert_{op}\leq \left\lVert U-V\right\rVert_2$ where $f_U = A\mapsto UAU^*$?

Spectral theorem for inductive limits of $C^*$-Algebras

Examples of unbounded approximate units in $C^*$-algebras

$\left [(A- \langle A \rangle ),\right (B- \langle B \rangle )]=\left [A,B \right ] $

Projections in C*-algebras

$a^{\dagger}a(a^{\dagger})^{n-1}+(a^{\dagger})^{n-1}=n(a^{\dagger})^{n-1}$

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