List questions from c-star-algebras

153

Views

Typo in Murphy's book: $ \sigma_A(b)= \sigma_B(b) \cup \{0\}$ or $ \sigma_A(b) \cup \{0\}= \sigma_B(b) \cup \{0\}$

Published on 21 Nov 2014 - 3:34

940

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Unitaries $u$ span $A$ linearly?

Published on 21 Nov 2014 - 8:21

387

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Positive Elements in a C*algebra

Published on 27 Mar 2026 - 4:56

37

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A certain limit of a state is zero

Published on 27 Mar 2026 - 6:42

40

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Can a "tangent vector of a discrete group" be extended to a tangent vector of its $C^*$-algebra?

Published on 23 Nov 2014 - 17:01

1.3k

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positive elements in $C^*$ algebras and states

Published on 27 Mar 2026 - 6:42

349

Views

Important and simple example of application for functional calculus?

Published on 24 Nov 2014 - 23:55

24

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Why is the restriction of a character here non zero?

Published on 25 Nov 2014 - 7:43

96

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Is this equality true or it is not necessarily true?

Published on 27 Mar 2026 - 6:42

223

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Positive invertible element of a C*- algebra

Published on 26 Nov 2014 - 17:38

73

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Unital maps taking values in abelian C*-algebras

Published on 27 Nov 2014 - 12:40

43

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$b \le \|b\|$ even when $b$ is not normal or self-adjoint?

Published on 29 Nov 2014 - 1:21

282

Views

construction of an injective representation of $C_0(X)$

Published on 27 Mar 2026 - 6:42

53

Views

Restriction of an irreducible representation

Published on 29 Nov 2014 - 13:25

207

Views

Irreducible representation

Published on 29 Nov 2014 - 14:02

List Question

Typo in Murphy's book: $ \sigma_A(b)= \sigma_B(b) \cup \{0\}$ or $ \sigma_A(b) \cup \{0\}= \sigma_B(b) \cup \{0\}$

Unitaries $u$ span $A$ linearly?

Positive Elements in a C*algebra

A certain limit of a state is zero

Can a "tangent vector of a discrete group" be extended to a tangent vector of its $C^*$-algebra?

positive elements in $C^*$ algebras and states

Important and simple example of application for functional calculus?

Why is the restriction of a character here non zero?

Is this equality true or it is not necessarily true?

Positive invertible element of a C*- algebra

Unital maps taking values in abelian C*-algebras

$b \le \|b\|$ even when $b$ is not normal or self-adjoint?

construction of an injective representation of $C_0(X)$

Restriction of an irreducible representation

Irreducible representation

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