List questions from spectral-theory

Published on 23 Jun 2014 - 19:22

115

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Eigenvalues of polynomials of a matrix and its inverse up to summation by identity

Published on 23 Jun 2014 - 19:52

116

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Diagonalisation spectral theorem

Published on 24 Jun 2014 - 22:16

221

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What is the right domain for this Hamiltonian

Published on 26 Jun 2014 - 13:32

1.2k

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Proving the spectral theorem for unbounded self-adjoint operators

Published on 29 Jun 2014 - 13:49

349

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Mathieu differential equation

Published on 30 Jun 2014 - 12:21

368

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Positive Elements: Characterization

Published on 26 Mar 2026 - 17:52

94

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Pseudospectrum of an $n\times n$ matrix has at most n connected components

Published on 02 Jul 2014 - 6:46

437

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Lower bound for the spectralradius of a matrix

Published on 08 Jul 2014 - 9:33

870

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Spectrum of normal elements in C*-algebras

Published on 26 Mar 2026 - 17:53

228

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To What Extent is the Fourier Inversion Theorem Due to the Self-Adjointedness of the Laplacian

Published on 25 Mar 2026 - 20:12

565

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Reference for simplicity of the principal eigenvalue of the Laplacian

Published on 16 Jul 2014 - 17:33

411

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Prove that for density operators, if $\rho=\sum_i \rho_i P_i$ then $\log\rho=\sum_i P_i\log \rho_i$

Published on 21 Jul 2014 - 15:32

698

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Spectral theory

Published on 22 Jul 2014 - 12:00

1.3k

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Two questions in spectral theory: the spectrum of the Fourier transform and the Hamiltonian of the hydrogen atom.

Published on 24 Jul 2014 - 13:44

List Question

Spectrum of a bounded operator $T$ satisfying $T^n=I$

Eigenvalues of polynomials of a matrix and its inverse up to summation by identity

Diagonalisation spectral theorem

What is the right domain for this Hamiltonian

Proving the spectral theorem for unbounded self-adjoint operators

Mathieu differential equation

Positive Elements: Characterization

Pseudospectrum of an $n\times n$ matrix has at most n connected components

Lower bound for the spectralradius of a matrix

Spectrum of normal elements in C*-algebras

To What Extent is the Fourier Inversion Theorem Due to the Self-Adjointedness of the Laplacian

Reference for simplicity of the principal eigenvalue of the Laplacian

Prove that for density operators, if $\rho=\sum_i \rho_i P_i$ then $\log\rho=\sum_i P_i\log \rho_i$

Spectral theory

Two questions in spectral theory: the spectrum of the Fourier transform and the Hamiltonian of the hydrogen atom.

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