List questions from spectral-theory

Published on 16 May 2019 - 9:03

39

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Does the spectrum at a point vary continuously in this case?

Published on 17 May 2019 - 15:33

45

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Spectral Theory of Markov Jump Processes (continuous-time)

Published on 25 Mar 2026 - 19:16

1.1k

Views

The spectral decomposition of skew symmetric matrix

Published on 21 May 2019 - 22:07

138

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Basic measures and $L^\infty$ functional calculus

Published on 23 Feb 2026 - 4:51

84

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I want to find an example where the Spectrum is equal to the Continuous Spectrum in C[0,1]; $\sigma_c(A)=\sigma(A)$

Published on 24 May 2019 - 7:43

25

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Spectrum of an operator $\sigma(L)$

Published on 25 May 2019 - 17:19

546

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Spectrum of compact operator on infinite dimensional Hilbert space is countably infinite

Published on 26 Mar 2026 - 1:15

57

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Operator with given spectrum which is not projector.

Published on 26 Mar 2026 - 3:18

102

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Obtaining directional derivatives from the gradient of the projection onto the positive semidefinite cone.

Published on 26 Mar 2026 - 4:53

288

Views

On the connections between the spectral theorem and functional calculus for normal operators.

Published on 23 Feb 2026 - 4:55

652

Views

Prove that a kernel operator has no eigenvalues

Published on 09 Jun 2019 - 16:42

69

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Spectral analysis of a $2\times 2$ matrix

Published on 10 Jun 2019 - 9:41

189

Views

When is $\exp(-iHt)$ well-defined?

Published on 10 Jun 2019 - 19:12

2.9k

Views

inverse of self-adjoint operator is self-adjoint

Published on 25 Mar 2026 - 10:54

List Question

Restriction of a compact operator on a finite-dimensional subspace

Does the spectrum at a point vary continuously in this case?

Spectral Theory of Markov Jump Processes (continuous-time)

The spectral decomposition of skew symmetric matrix

Basic measures and $L^\infty$ functional calculus

I want to find an example where the Spectrum is equal to the Continuous Spectrum in C[0,1]; $\sigma_c(A)=\sigma(A)$

Spectrum of an operator $\sigma(L)$

Spectrum of compact operator on infinite dimensional Hilbert space is countably infinite

Operator with given spectrum which is not projector.

Obtaining directional derivatives from the gradient of the projection onto the positive semidefinite cone.

On the connections between the spectral theorem and functional calculus for normal operators.

Prove that a kernel operator has no eigenvalues

Spectral analysis of a $2\times 2$ matrix

When is $\exp(-iHt)$ well-defined?

inverse of self-adjoint operator is self-adjoint

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