List questions from operator-theory

Published on 10 Apr 2026 - 18:11

174

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Product of three bounded linear operators

Published on 11 Apr 2026 - 12:32

182

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Diagonal Matrix

Published on 13 Apr 2026 - 23:50

92

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What's going wrong in writing matrix version of Fejer-Riesz lemma?

Published on 15 Apr 2026 - 16:44

336

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spectrum/compactness of operator

Published on 09 Apr 2026 - 0:25

78

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Inequality $\mbox{tr}(A \log B) \ge \mbox{tr}(A \log A)$

Published on 16 Apr 2026 - 14:30

816

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The spectral theorem and direct integrals

Published on 14 Apr 2026 - 13:33

110

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Can a finite dimension operator space faithfully represented in a finite dimensional operator algebra?

Published on 14 Apr 2026 - 6:40

98

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Does $|Tf|=T|f|$ hold for positive operators?

Published on 10 Apr 2026 - 11:36

164

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Operator defined on orthonormal basis

Published on 11 Apr 2026 - 16:02

137

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Computing spectrum of operator via matrix

Published on 12 Apr 2026 - 7:23

46

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Show that $x\mapsto \operatorname{tr}\left[{\rm D}^2F(x)\left(\Phi(x)Q^{1/2}\right)\left(\Phi(x)Q^{1/2}\right)^\ast\right]$ is Lipschitz continuous

Published on 09 Apr 2026 - 13:55

247

Views

When is the following negative semi-definite?

Published on 14 Apr 2026 - 2:47

288

Views

Defining a trace-class operator with a Bochner integral

Published on 09 Apr 2026 - 18:21

394

Views

Computing eigenfunction of expectational operator

Published on 10 Apr 2026 - 12:09

List Question

A kind of non-Abelian shift operation

Product of three bounded linear operators

Diagonal Matrix

What's going wrong in writing matrix version of Fejer-Riesz lemma?

spectrum/compactness of operator

Inequality $\mbox{tr}(A \log B) \ge \mbox{tr}(A \log A)$

The spectral theorem and direct integrals

Can a finite dimension operator space faithfully represented in a finite dimensional operator algebra?

Does $|Tf|=T|f|$ hold for positive operators?

Operator defined on orthonormal basis

Computing spectrum of operator via matrix

Show that $x\mapsto \operatorname{tr}\left[{\rm D}^2F(x)\left(\Phi(x)Q^{1/2}\right)\left(\Phi(x)Q^{1/2}\right)^\ast\right]$ is Lipschitz continuous

When is the following negative semi-definite?

Defining a trace-class operator with a Bochner integral

Computing eigenfunction of expectational operator

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