List questions from operator-theory

Published on 05 Apr 2014 - 14:54

62

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Conjugating an operator with a gauge transformation; how is the kernel affected.

Published on 25 Mar 2026 - 7:42

403

Views

Fast argument to see that the dual map of a projection is a projection

Published on 06 Apr 2014 - 14:05

127

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How to get a grip on codimensions

Published on 30 Mar 2026 - 6:58

2.1k

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The image of an bounded and linear operator between two banach spaces is closed if the image is finite codimension?

Published on 30 Mar 2026 - 7:00

28

Views

Integral's limit

Published on 07 Apr 2014 - 14:36

2.6k

Views

Why does exponentiating the derivative yield the shift operator?

Published on 28 Mar 2026 - 20:51

192

Views

Showing a particular integral operator is trace class

Published on 31 Mar 2026 - 3:12

35

Views

Positivity of certain matrix

Published on 09 Apr 2014 - 9:58

55

Views

The index of some perturbation about elliptic operator with Robin boundary condition

Published on 09 Apr 2014 - 16:03

270

Views

Immediate consequence of the definition of Operator Norm. Explain

Published on 04 Apr 2026 - 11:27

64

Views

Common eigenvector of a sequence of compact operators

Published on 12 Apr 2014 - 4:30

248

Views

is this true for Hilbert space direct sum of $H$ when $H$ is infinite dimensional?

Published on 01 Apr 2026 - 5:04

160

Views

Norm of a projection in $L_p$

Published on 30 Mar 2026 - 11:03

477

Views

Isometric <=> Left Inverse Adjoint

Published on 26 Mar 2026 - 18:30

List Question

Show that any compact set in $\mathbb{C}$ is the spectrum of an operator.

Conjugating an operator with a gauge transformation; how is the kernel affected.

Fast argument to see that the dual map of a projection is a projection

How to get a grip on codimensions

The image of an bounded and linear operator between two banach spaces is closed if the image is finite codimension?

Integral's limit

Why does exponentiating the derivative yield the shift operator?

Showing a particular integral operator is trace class

Positivity of certain matrix

The index of some perturbation about elliptic operator with Robin boundary condition

Immediate consequence of the definition of Operator Norm. Explain

Common eigenvector of a sequence of compact operators

is this true for Hilbert space direct sum of $H$ when $H$ is infinite dimensional?

Norm of a projection in $L_p$

Isometric <=> Left Inverse Adjoint

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