List questions from differential-operators

Published on 14 Dec 2021 - 10:57

195

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PDE - Fritz John Problem 4 Chapter 2, linear operators and common solutions

Published on 20 Dec 2021 - 3:07

74

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Why is the norm of $x_n(t) = t^n$ for the differentation operator equal to 1?

Published on 01 Jan 2022 - 15:59

163

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Calculating the Principal Part of a Differential Operator

Published on 06 Jan 2022 - 6:04

29

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galilean transformation identity

Published on 13 Jan 2022 - 11:19

85

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How to take "limits" of operators?

Published on 17 Jan 2022 - 21:34

56

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Does an almost complex structure $J$ induce a differential operator on $TM$?

Published on 21 Jan 2022 - 23:30

58

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Proof of a Douglas counterexample

Published on 22 Jan 2022 - 19:14

278

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Proof of invariance of propagators or Green functions from their defining property rather than an explicit expression (Klein-Gordon eq.)

Published on 26 Mar 2026 - 0:54

74

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Why does the d/dx operator output a derivative, whereas the integral operator accepts a differential?

Published on 02 Feb 2022 - 19:02

43

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Please tell me the correct transformation matrix for this trig vector space

Published on 03 Feb 2022 - 9:04

60

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A coordinate-free criterion for ellipticity of a linear differential operator

Published on 26 Mar 2026 - 1:35

274

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Finding an operator C that satisfies AB=CA

Published on 23 Feb 2026 - 4:36

109

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What does $D^tf$ mean?

Published on 21 Feb 2022 - 19:32

14

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Finding the double derivative in the distributional sense

Published on 24 Feb 2022 - 13:22

List Question

Derivative with respect to a functional

PDE - Fritz John Problem 4 Chapter 2, linear operators and common solutions

Why is the norm of $x_n(t) = t^n$ for the differentation operator equal to 1?

Calculating the Principal Part of a Differential Operator

galilean transformation identity

How to take "limits" of operators?

Does an almost complex structure $J$ induce a differential operator on $TM$?

Proof of a Douglas counterexample

Proof of invariance of propagators or Green functions from their defining property rather than an explicit expression (Klein-Gordon eq.)

Why does the d/dx operator output a derivative, whereas the integral operator accepts a differential?

Please tell me the correct transformation matrix for this trig vector space

A coordinate-free criterion for ellipticity of a linear differential operator

Finding an operator C that satisfies AB=CA

What does $D^tf$ mean?

Finding the double derivative in the distributional sense

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