List questions from operator-algebras

Published on 28 Mar 2026 - 17:42

68

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Projections in atomless von Neumann algebras

Published on 28 Mar 2026 - 13:40

39

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The map $\xi \mapsto \omega_\xi$ from a Hilbert space to the pre-dual of a von Neumann algebra is continuous

Published on 28 Mar 2026 - 15:21

471

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Example of operator that commutes with a given multiplication that is not itself a multiplication.

Published on 28 Mar 2026 - 10:28

32

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$\int_0^\lambda z de_z+\lambda p$ is a positive element of a von Neumann algebra $M$ whenever $\lambda >0$

Published on 28 Mar 2026 - 13:40

48

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Summation of extension

Published on 14 Nov 2023 - 19:18

197

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How to give a closed form to $e^{a(x) \frac{d}{dx} + b(x)I}[f]$ in physicists style abuse of notation?

Published on 25 Mar 2026 - 23:42

55

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$\{x\in M_+:\phi(x)<\infty\}$ is dense in $M_+$ whenever $\{x\in M: \phi(x^*x)<\infty\}$ is dense in $M$ with respect to ultraweak topology

Published on 28 Mar 2026 - 16:58

126

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Restricting and extending *-homomorphisms with norm-dense subalgebras

Published on 26 Mar 2026 - 4:32

58

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Relationship between *-homomorphism and isometries

Published on 17 Nov 2023 - 21:19

120

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Inverse Fourier Transform on LCA Groups

Published on 18 Nov 2023 - 17:26

110

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Existence of a weak-star limit of a family of operators in $B(\mathcal{H})$

Published on 26 Mar 2026 - 11:17

70

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Connection between Operator Theory and Number Theory

Published on 27 Mar 2026 - 13:25

67

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Is the tensor product of W*-algebras commutative?

Published on 28 Mar 2026 - 22:35

62

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The support of the unbounded operator

Published on 28 Mar 2026 - 20:55

List Question

Close to a projection implies almost idempotent in C*-Algebra

Projections in atomless von Neumann algebras

The map $\xi \mapsto \omega_\xi$ from a Hilbert space to the pre-dual of a von Neumann algebra is continuous

Example of operator that commutes with a given multiplication that is not itself a multiplication.

$\int_0^\lambda z de_z+\lambda p$ is a positive element of a von Neumann algebra $M$ whenever $\lambda >0$

Summation of extension

How to give a closed form to $e^{a(x) \frac{d}{dx} + b(x)I}[f]$ in physicists style abuse of notation?

$\{x\in M_+:\phi(x)<\infty\}$ is dense in $M_+$ whenever $\{x\in M: \phi(x^*x)<\infty\}$ is dense in $M$ with respect to ultraweak topology

Restricting and extending *-homomorphisms with norm-dense subalgebras

Relationship between *-homomorphism and isometries

Inverse Fourier Transform on LCA Groups

Existence of a weak-star limit of a family of operators in $B(\mathcal{H})$

Connection between Operator Theory and Number Theory

Is the tensor product of W*-algebras commutative?

The support of the unbounded operator

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