List questions from spectral-theory

Published on 10 Dec 2019 - 6:41

443

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Finding a spectrum of an operator in $C[0, 1]$

Published on 11 Dec 2019 - 0:16

74

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How does this proof of finding a maximum value of a multi-variable function using Linear Algebra work?

Published on 29 Mar 2026 - 7:22

517

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Essential spectrum of squared operator

Published on 15 Dec 2019 - 16:27

653

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A better algorithm to find the minimum polynomial of a matrix?

Published on 15 Dec 2019 - 21:30

59

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For $f\in L^2$, the function $(-\Delta)^{-1/2}f$ is in $L^2 + L^\infty$.

Published on 26 Mar 2026 - 16:05

1.4k

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The smallest non-zero singular value of AB

Published on 26 Mar 2026 - 21:12

366

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Rank of product of two orthogonal matrices

Published on 26 Mar 2026 - 21:09

59

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spectrum of multiplicative maps

Published on 20 Dec 2019 - 22:43

53

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Find the possible eigenvalues of $T$

Published on 21 Dec 2019 - 21:48

161

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Spectrum of an element changes with extension of algebra

Published on 27 Mar 2026 - 9:48

211

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Spectrum of $-\frac{d^2}{dx^2}$ with respect to space of continuous periodic functions on $[0,2\pi]$

Published on 23 Dec 2019 - 14:24

92

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spectrum of $-\frac{d^2}{dx^2}$ with respect to $C[0,2\pi]$ with Dirichlet boundary conditions

Published on 26 Dec 2019 - 22:53

95

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Laplacian spectrum

Published on 25 Mar 2026 - 22:24

78

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Where precisely is topology required to prove the existence of non-zero eigenstates in the proof of the spectral theorem?

Published on 28 Mar 2026 - 22:29

List Question

Spectrum of a Linear Operator question

Finding a spectrum of an operator in $C[0, 1]$

How does this proof of finding a maximum value of a multi-variable function using Linear Algebra work?

Essential spectrum of squared operator

A better algorithm to find the minimum polynomial of a matrix?

For $f\in L^2$, the function $(-\Delta)^{-1/2}f$ is in $L^2 + L^\infty$.

The smallest non-zero singular value of AB

Rank of product of two orthogonal matrices

spectrum of multiplicative maps

Find the possible eigenvalues of $T$

Spectrum of an element changes with extension of algebra

Spectrum of $-\frac{d^2}{dx^2}$ with respect to space of continuous periodic functions on $[0,2\pi]$

spectrum of $-\frac{d^2}{dx^2}$ with respect to $C[0,2\pi]$ with Dirichlet boundary conditions

Laplacian spectrum

Where precisely is topology required to prove the existence of non-zero eigenstates in the proof of the spectral theorem?

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