List questions from unbounded-operators

Published on 01 Feb 2016 - 8:09

605

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On the definition of commuting self adjoint operators.

Published on 13 Feb 2016 - 5:12

627

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Does an essentially self-adjoint operator have the same kernel as its closure?

Published on 01 Mar 2016 - 0:56

110

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A counter example for adjoint of unbounded operators

Published on 23 Mar 2016 - 16:02

313

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Does a closed unbounded operator commutes with Riemann integral?

Published on 12 Apr 2016 - 17:32

1.3k

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Spectrum of a positive operator

Published on 15 Apr 2016 - 11:02

170

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Can the adjoint of unbounded operators bounded?

Published on 22 Apr 2016 - 0:08

733

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Essential singularity of the resolvent operator of an unbounded operator

Published on 30 Apr 2016 - 12:01

111

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inverse of operator

Published on 25 Mar 2026 - 20:12

212

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Two definitions of the operator $\exp(x)$ in $L^2(\mathbb R)$

Published on 03 May 2016 - 18:05

319

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Function $f$ such that $f''\in L^2(\mathbb{R})$

Published on 08 May 2016 - 12:33

131

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If operators $A, B, A+B$ are all closable, show that $\overline{A + B} \supseteq \overline{A} + \overline{B}$.

Published on 10 May 2016 - 20:39

241

Views

spectral projection of an isolated point in the spectrum of a closed linear operator

Published on 11 May 2016 - 8:59

236

Views

For a densely defined symmetric operator $A$, is $A^2$ also densely defined?

Published on 31 May 2016 - 17:16

577

Views

Continuous inverse of an unbounded operator on a Hilbert space

Published on 18 Jun 2016 - 0:05

List Question

Superset of the spectrum of the sum of a self adjoint operator and a bounded operator.

On the definition of commuting self adjoint operators.

Does an essentially self-adjoint operator have the same kernel as its closure?

A counter example for adjoint of unbounded operators

Does a closed unbounded operator commutes with Riemann integral?

Spectrum of a positive operator

Can the adjoint of unbounded operators bounded?

Essential singularity of the resolvent operator of an unbounded operator

inverse of operator

Two definitions of the operator $\exp(x)$ in $L^2(\mathbb R)$

Function $f$ such that $f''\in L^2(\mathbb{R})$

If operators $A, B, A+B$ are all closable, show that $\overline{A + B} \supseteq \overline{A} + \overline{B}$.

spectral projection of an isolated point in the spectrum of a closed linear operator

For a densely defined symmetric operator $A$, is $A^2$ also densely defined?

Continuous inverse of an unbounded operator on a Hilbert space

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