List questions from operator-algebras

Published on 08 Apr 2026 - 19:09

136

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$\left[A, e^{\lambda B}\right]=\lambda e^{\lambda B}[A, B]$ proof?

Published on 23 Mar 2021 - 12:43

129

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Von Neumann Algebra built from the bilateral shift

Published on 31 Mar 2026 - 1:10

126

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Unitary Operators in Hilbert's space are arcwise connected using functional calculus

Published on 24 Mar 2021 - 2:14

25

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On a specific C*-algebra

Published on 24 Mar 2021 - 2:52

81

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Why is the unitization of $M_\infty(\mathbb{C})$ not complete?

Published on 30 Mar 2026 - 0:03

34

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Expression for $\{B,e^A\}$ where $\{[B,A],A\}=0$

Published on 24 Mar 2021 - 19:49

194

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Extracting quasi-central approximate units: why is this an increasing net?

Published on 28 Mar 2021 - 14:46

137

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Existence of projections within $C^*$-algebra

Published on 29 Mar 2021 - 19:29

72

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$\|x\| \leq \|x(h)\|$ for all $x\in A$ implies $\dim A < \infty$.

Published on 29 Mar 2021 - 22:48

166

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Non-nuclear C* subalgebras of a non-nuclear C* algebra

Published on 09 Apr 2026 - 3:54

67

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Left/ Right Invertibility of an element in the spectrum

Published on 01 Apr 2021 - 5:24

79

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Quasidiagonality and homotopy invariance: norm inequality occurring in the proof

Published on 02 Apr 2021 - 11:11

50

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Algebra involving operator of x and p

Published on 03 Apr 2026 - 11:48

43

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representation from a ideal to $B(H)$

Published on 04 Apr 2021 - 14:44

List Question

How special is the Cantor-set spectrum of the almost mathieu-operator?

$\left[A, e^{\lambda B}\right]=\lambda e^{\lambda B}[A, B]$ proof?

Von Neumann Algebra built from the bilateral shift

Unitary Operators in Hilbert's space are arcwise connected using functional calculus

On a specific C*-algebra

Why is the unitization of $M_\infty(\mathbb{C})$ not complete?

Expression for $\{B,e^A\}$ where $\{[B,A],A\}=0$

Extracting quasi-central approximate units: why is this an increasing net?

Existence of projections within $C^*$-algebra

$\|x\| \leq \|x(h)\|$ for all $x\in A$ implies $\dim A < \infty$.

Non-nuclear C* subalgebras of a non-nuclear C* algebra

Left/ Right Invertibility of an element in the spectrum

Quasidiagonality and homotopy invariance: norm inequality occurring in the proof

Algebra involving operator of x and p

representation from a ideal to $B(H)$

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