List questions from c-star-algebras

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Sum of closed ideals is closed in a $C^{\ast}$-algebra?

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Representation of states in $C^*$-algebras

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Quasi-equivalent and Equivalent Representations of C* Algebras

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

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Linear map of unitization of a non-unital $C^\ast$-algebra

Published on 14 Apr 2026 - 3:30

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Spectrum of a direct product of commutative $C^*$-algebras.

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Banach space of a unitization non-unital $C^\ast$-algebra and norms as well

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Group C* algebra realized as crossed product

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$\ast$-isomorphic between two $C^\ast$-algebras

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C* algebras with no nilpotent elements are commutative

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$(a-\lambda)^{-1}$ belongs to the $C^{*}$-subalgebra generated by $a$?

Published on 12 Apr 2026 - 8:30

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Question about the completion of the GNS representation

Published on 10 Apr 2026 - 17:45

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How to show two equivalent projection in a $C^*$ algebra are not homotopic

Published on 14 Apr 2026 - 10:34

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Idempotency conditions for operators in a Hilbert space

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List Question

AF algebras have an approximate unity consisting of projections

Sum of closed ideals is closed in a $C^{\ast}$-algebra?

Representation of states in $C^*$-algebras

Quasi-equivalent and Equivalent Representations of C* Algebras

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

Linear map of unitization of a non-unital $C^\ast$-algebra

Spectrum of a direct product of commutative $C^*$-algebras.

Banach space of a unitization non-unital $C^\ast$-algebra and norms as well

Group C* algebra realized as crossed product

$\ast$-isomorphic between two $C^\ast$-algebras

C* algebras with no nilpotent elements are commutative

$(a-\lambda)^{-1}$ belongs to the $C^{*}$-subalgebra generated by $a$?

Question about the completion of the GNS representation

How to show two equivalent projection in a $C^*$ algebra are not homotopic

Idempotency conditions for operators in a Hilbert space

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