List questions from c-star-algebras

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Theory for finite-dimensional representations of C*-algebras

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The equation $ab+ba=0, a=a^, b=b^$ in a $C^*$ algebra

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An Ideal Correspondence For Twisted C*-Dynamical Sytems?

Published on 27 Mar 2026 - 14:30

126

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A question on disjointness preserving operator

Published on 02 Apr 2026 - 11:00

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Doubt on Von Neumann algebra decomposition as integral of factors

Published on 25 Mar 2026 - 17:40

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Von Neumann algebra decomposition as integral of factors and mixed state decomposition as sum of irreducible states

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38

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GNS construction when no approximate identity

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Unitary "phase" in *-algebra

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What are the most general structures that admit a singular value decomposition for each element?

Published on 28 Mar 2026 - 8:49

38

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Smeared polynomials of creation and annihilation operators

Published on 25 Mar 2026 - 19:02

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Strictly positive element in a von Neumann algebra

Published on 28 Mar 2026 - 10:16

114

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Let $A$ be a unital $C^$-algebra, $a\in A,\ x,y\in A_{sa}$. Does there exist a state $\phi$ on $A$ such that $\phi(xa^ay)=\lVert a\rVert^2\phi(xy)$?

Published on 02 Apr 2026 - 12:37

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$\sup \{upu^*: u \in \mathcal U( M)\}$ is a central projection of a von Neumann algebra $M$

Published on 28 Mar 2026 - 10:24

73

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If all unital Banach algebras contain maximal ideals, then why doesn't $M_n(\mathbb{C})$ have proper ideals?

Published on 28 Mar 2026 - 8:50

List Question

Modules over C-algebras and W-algebras

Theory for finite-dimensional representations of C*-algebras

The equation $ab+ba=0, a=a^, b=b^$ in a $C^*$ algebra

An Ideal Correspondence For Twisted C*-Dynamical Sytems?

A question on disjointness preserving operator

Doubt on Von Neumann algebra decomposition as integral of factors

Von Neumann algebra decomposition as integral of factors and mixed state decomposition as sum of irreducible states

GNS construction when no approximate identity

Unitary "phase" in *-algebra

What are the most general structures that admit a singular value decomposition for each element?

Smeared polynomials of creation and annihilation operators

Strictly positive element in a von Neumann algebra

Let $A$ be a unital $C^$-algebra, $a\in A,\ x,y\in A_{sa}$. Does there exist a state $\phi$ on $A$ such that $\phi(xa^ay)=\lVert a\rVert^2\phi(xy)$?

$\sup \{upu^*: u \in \mathcal U( M)\}$ is a central projection of a von Neumann algebra $M$

If all unital Banach algebras contain maximal ideals, then why doesn't $M_n(\mathbb{C})$ have proper ideals?

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