List questions from banach-algebras

Published on 25 Mar 2026 - 16:09

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Example of a Banach algebra with given property

Published on 22 Feb 2019 - 8:38

41

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some examples of a Banach algebra with given conditions

Published on 23 Feb 2019 - 6:20

44

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Simple proof that $x^x$ is positive in a commutative $C^$-Algebra

Published on 04 Mar 2019 - 5:04

97

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Explaining the group structure in homotopy classes of map $[X,K(H)]$

Published on 04 Mar 2019 - 10:58

830

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Does $e^{a+b}=e^{a}e^{b}$ implies that $ab=ba$ for banach algebras?

Published on 06 Mar 2019 - 7:51

472

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Is the limit of the spectral radius the spectral radius of the limit?

Published on 12 Mar 2019 - 18:21

38

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The set of all inner derivations $\mathcal{B}^1(A, X)$ is not closed in the set of continuous derivations $\mathcal{Z}^1(A, X)$,

Published on 14 Mar 2019 - 9:20

48

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exponential null operator

Published on 16 Mar 2019 - 21:36

168

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Spectrum invariance under the passage to a sub Banach Algebra

Published on 18 Mar 2019 - 19:03

171

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Limit of a convergent sequence of invertible elements in a Banach algebra

Published on 25 Mar 2019 - 12:47

132

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Using "formal" formulas to get non-formal results

Published on 25 Mar 2026 - 20:17

63

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Regarding an entire function being affine

Published on 25 Mar 2026 - 17:26

189

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When is a surjective homomorphism between two unital Banach algebras bounded?

Published on 23 Mar 2026 - 5:13

68

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On "An elementary proof of a fundamental theorem in the theory of Banach algebras" by C.E.Rickart

Published on 05 Apr 2019 - 17:31

List Question

Modern introduction to $C^*$-algebras

Example of a Banach algebra with given property

some examples of a Banach algebra with given conditions

Simple proof that $x^x$ is positive in a commutative $C^$-Algebra

Explaining the group structure in homotopy classes of map $[X,K(H)]$

Does $e^{a+b}=e^{a}e^{b}$ implies that $ab=ba$ for banach algebras?

Is the limit of the spectral radius the spectral radius of the limit?

The set of all inner derivations $\mathcal{B}^1(A, X)$ is not closed in the set of continuous derivations $\mathcal{Z}^1(A, X)$,

exponential null operator

Spectrum invariance under the passage to a sub Banach Algebra

Limit of a convergent sequence of invertible elements in a Banach algebra

Using "formal" formulas to get non-formal results

Regarding an entire function being affine

When is a surjective homomorphism between two unital Banach algebras bounded?

On "An elementary proof of a fundamental theorem in the theory of Banach algebras" by C.E.Rickart

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