List questions from spectral-theory

Published on 03 May 2013 - 0:40

119

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Can I deal with the weak derivative in the "strong" sense?

Published on 03 May 2013 - 3:28

3.2k

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Residual spectrum is empty

Published on 03 May 2013 - 10:09

1.2k

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Spectrum of the unbounded operator $i\partial_x$

Published on 04 May 2013 - 4:18

581

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Null spaces and projections

Published on 04 May 2013 - 23:18

1.2k

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Representation of a bilinear form on an Hilbert space

Published on 28 Mar 2026 - 11:33

524

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spectral radius monotonicity

Published on 05 May 2013 - 16:17

598

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Spectral family property: $\lambda \geq M \Rightarrow E_{\lambda} = I$

Published on 06 May 2013 - 12:04

1.2k

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Spectrum proofs

Published on 06 May 2013 - 19:09

1.3k

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spectrum of unitary operator

Published on 07 May 2013 - 18:25

3.6k

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Spectral Theorem for bounded compact, self-adjoint operators as corollary of Hilbert-Schmidt theorem

Published on 08 May 2013 - 12:48

214

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Dirichlet eigenvalue problem on the Hilbert cube

Published on 09 May 2013 - 22:14

953

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Gelfand's formula, different field

Published on 02 Apr 2026 - 1:43

102

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What is twisted triangular two-torus also called a triangular doughnut?

Published on 14 May 2013 - 19:37

225

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SVD, infinite matrices and normal operators from a function

Published on 30 Mar 2026 - 8:31

List Question

Find spectrum of the operator and an explicit form for the solution

Can I deal with the weak derivative in the "strong" sense?

Residual spectrum is empty

Spectrum of the unbounded operator $i\partial_x$

Null spaces and projections

Representation of a bilinear form on an Hilbert space

spectral radius monotonicity

Spectral family property: $\lambda \geq M \Rightarrow E_{\lambda} = I$

Spectrum proofs

spectrum of unitary operator

Spectral Theorem for bounded compact, self-adjoint operators as corollary of Hilbert-Schmidt theorem

Dirichlet eigenvalue problem on the Hilbert cube

Gelfand's formula, different field

What is twisted triangular two-torus also called a triangular doughnut?

SVD, infinite matrices and normal operators from a function

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