List questions from c-star-algebras

Published on 09 Apr 2026 - 11:41

55

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A minimal maximizing set for a Banach algebra

Published on 09 Apr 2026 - 13:57

94

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Set of Characters for $C([0,1])$

Published on 09 Apr 2026 - 13:57

152

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Uniqueness in spectral theorem for commutative (non-unital) Banach $*$-algebras

Published on 01 Apr 2026 - 5:48

155

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$\tau$ is a pure state and $\tau(a)=0$. Then $a=b+c$ for some $b,c$ with $\tau (b^b)=\tau(cc^)=0$.

Published on 17 Mar 2021 - 23:40

52

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Are all $*$-algebras with matrix representations projective?

Published on 27 Feb 2026 - 20:11

49

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Tracial states on $C_\text{r}^\ast(\mathbf{D}_\infty)$, $\mathbf{D}_\infty$ being the infinite dihedral group

Published on 29 Mar 2026 - 4:47

324

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Every closed ideal in $C(X)$ is the set of functions that vanish on some closed subset

Published on 09 Apr 2026 - 13:47

96

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Increasing net of projections in von Neumann algebra

Published on 11 Apr 2026 - 9:19

71

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K theory of the wedge of circles

Published on 29 Mar 2026 - 11:44

198

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When can we make $H$ separable in $A\subset B(H)$?

Published on 31 Mar 2026 - 5:02

80

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One sided ideal in finite dimensional $\mathrm{C}^*$-algebras

Published on 23 Mar 2021 - 0:11

395

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Unitary Operators are Connected in a $C^*$-algebra

Published on 23 Mar 2021 - 4:22

129

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Simplest (completely) positive maps

Published on 30 Mar 2026 - 2:57

128

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

Published on 10 Apr 2026 - 21:09

List Question

Spatial isomorphism between type I factors

A minimal maximizing set for a Banach algebra

Set of Characters for $C([0,1])$

Uniqueness in spectral theorem for commutative (non-unital) Banach $*$-algebras

$\tau$ is a pure state and $\tau(a)=0$. Then $a=b+c$ for some $b,c$ with $\tau (b^b)=\tau(cc^)=0$.

Are all $*$-algebras with matrix representations projective?

Tracial states on $C_\text{r}^\ast(\mathbf{D}_\infty)$, $\mathbf{D}_\infty$ being the infinite dihedral group

Every closed ideal in $C(X)$ is the set of functions that vanish on some closed subset

Increasing net of projections in von Neumann algebra

K theory of the wedge of circles

When can we make $H$ separable in $A\subset B(H)$?

One sided ideal in finite dimensional $\mathrm{C}^*$-algebras

Unitary Operators are Connected in a $C^*$-algebra

Simplest (completely) positive maps

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

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