List questions from unbounded-operators

Published on 26 Mar 2026 - 17:32

832

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Example of a basis which is not a Riesz basis?

Published on 01 Dec 2020 - 13:15

91

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When the adjoint of an unbounded operator on a Hilbert space coincides with the formal adjoint on its maximal domain?

Published on 02 Dec 2020 - 10:15

181

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Prove $i\frac{d}{dx}$ is not essentially self-adjoint.

Published on 07 Dec 2020 - 11:08

468

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Relationship between the spectrum of $AA^$ and $A^A$

Published on 18 Dec 2020 - 1:30

1.2k

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Showing derivative operator is self-adjoint

Published on 28 Mar 2026 - 5:41

363

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Symmetry of Laplace operator

Published on 24 Dec 2020 - 21:48

175

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Multplication operator self-adjoint

Published on 26 Mar 2026 - 19:03

122

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Extending the Spectral Theorem of Unbounded Self-Adjoint Operators on Infinite-Dimensional Hilbert Spaces

Published on 26 Mar 2026 - 19:02

83

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Understanding the spectral measure of unbounded self-adjoint operator

Published on 24 Feb 2026 - 10:17

46

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Show that $\|B\varphi\| \le C(\|A \varphi\| + \|\varphi\|)$ extends from a core to entire domain of $A$

Published on 11 Feb 2021 - 16:01

128

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Fractional powers of an operator associated to a sesquilinear form

Published on 28 Mar 2026 - 0:30

51

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adjoint of unbounded differential operator

Published on 16 Feb 2021 - 7:00

334

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condition for postive symmetric operator to be essentially self-adjoint

Published on 20 Feb 2021 - 1:18

263

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Is the composition of closed unbounded operators closed?

Published on 01 Mar 2021 - 12:52

List Question

Essential self-adjointness of restriction of symmetric operator

Example of a basis which is not a Riesz basis?

When the adjoint of an unbounded operator on a Hilbert space coincides with the formal adjoint on its maximal domain?

Prove $i\frac{d}{dx}$ is not essentially self-adjoint.

Relationship between the spectrum of $AA^$ and $A^A$

Showing derivative operator is self-adjoint

Symmetry of Laplace operator

Multplication operator self-adjoint

Extending the Spectral Theorem of Unbounded Self-Adjoint Operators on Infinite-Dimensional Hilbert Spaces

Understanding the spectral measure of unbounded self-adjoint operator

Show that $\|B\varphi\| \le C(\|A \varphi\| + \|\varphi\|)$ extends from a core to entire domain of $A$

Fractional powers of an operator associated to a sesquilinear form

adjoint of unbounded differential operator

condition for postive symmetric operator to be essentially self-adjoint

Is the composition of closed unbounded operators closed?

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