List questions from c-star-algebras

Published on 20 Jul 2015 - 0:29

53

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Uniqueness of c.p.c. order zero extensions

Published on 03 Apr 2026 - 18:32

82

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Projections: Orthogonality

Published on 03 Apr 2026 - 4:23

42

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Semiprimitivity of second dual of semiprime Banach algebras

Published on 29 Mar 2026 - 3:36

251

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The inverse limit of C$^*$-algebras and whether it commutes with taking the minimal tensor product

Published on 03 Apr 2026 - 20:18

244

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Square root of a compact normal operator

Published on 27 Jul 2015 - 15:26

102

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Is the identity in unital, simple, purely infinite $C^*$-algebra always infinite?

Published on 27 Jul 2015 - 20:07

48

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C*-Algebra: Cyclic Elements

Published on 28 Jul 2015 - 16:38

446

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GNS construction and representations

Published on 29 Jul 2015 - 0:36

323

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the $C^\ast$-algebra $M_n(A)$, understanding the $C^\ast$-norm on $M_n(A)$

Published on 03 Apr 2026 - 20:17

440

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composition and strong limits of completely positive maps is completely positive

Published on 03 Apr 2026 - 20:16

37

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Why is $ab=ba=a^\ast b=ab^\ast=0$ (orthogonal elements in a $C^\ast$-algebra)?

Published on 29 Jul 2015 - 12:46

232

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Distributivity of projective tensor product over direct sum

Published on 29 Mar 2026 - 2:30

50

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How does the product of sets of complex numbers give a character?

Published on 29 Mar 2026 - 3:28

215

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How do you prove that every AF C*-algebra is finite?

Published on 03 Aug 2015 - 0:15

List Question

In a C*-algebra $A$, $x$ is self-adjoint iff $\lim_{t\to 0}(1/t)(\Vert 1-itx\Vert-1)=0$.

Uniqueness of c.p.c. order zero extensions

Projections: Orthogonality

Semiprimitivity of second dual of semiprime Banach algebras

The inverse limit of C$^*$-algebras and whether it commutes with taking the minimal tensor product

Square root of a compact normal operator

Is the identity in unital, simple, purely infinite $C^*$-algebra always infinite?

C*-Algebra: Cyclic Elements

GNS construction and representations

the $C^\ast$-algebra $M_n(A)$, understanding the $C^\ast$-norm on $M_n(A)$

composition and strong limits of completely positive maps is completely positive

Why is $ab=ba=a^\ast b=ab^\ast=0$ (orthogonal elements in a $C^\ast$-algebra)?

Distributivity of projective tensor product over direct sum

How does the product of sets of complex numbers give a character?

How do you prove that every AF C*-algebra is finite?

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