List questions from harmonic-analysis

Published on 25 Mar 2026 - 11:03

69

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A Curious sum of sines and cosines with angles in arithmetic progression

Published on 26 Feb 2014 - 13:38

197

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Absolute value operation in frequency domain

Published on 26 Feb 2014 - 18:11

72

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Harmonic inside with zero average

Published on 29 Mar 2026 - 10:59

246

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Uniqueness for second order PDE $-\Delta u = c(u)$

Published on 02 Apr 2026 - 13:07

179

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Induced measure on dual group and kernel of fourier transform

Published on 26 Mar 2026 - 21:09

39

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$\Bbb A_K'$ is a one dimensional $\Bbb A_K$ module

Published on 25 Mar 2026 - 12:15

79

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Bound on the inverse laplacian

Published on 06 Mar 2014 - 16:32

43

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Can we expect, $\left\|f|f|- g|g|\right\|\leq C \left \|f-g\right \|$ in the Banach algebra $A(\mathbb R)$?

Published on 30 Mar 2026 - 15:45

52

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The property of positive fourier series.

Published on 11 Mar 2014 - 14:08

62

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Closed ideal in $L^1(G)$

Published on 12 Apr 2017 - 15:11

482

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Rellich Integral Identity for Normal Derivatives

Published on 29 Mar 2026 - 8:14

1.5k

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Harmonic functions are analytic

Published on 02 Apr 2026 - 12:55

55

Views

Characterization of spherical harmonics.

Published on 26 Mar 2026 - 12:34

432

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Distributional limit.

Published on 07 Apr 2026 - 3:31

List Question

Closure of Schwartz space in homogeneous Besov space

A Curious sum of sines and cosines with angles in arithmetic progression

Absolute value operation in frequency domain

Harmonic inside with zero average

Uniqueness for second order PDE $-\Delta u = c(u)$

Induced measure on dual group and kernel of fourier transform

$\Bbb A_K'$ is a one dimensional $\Bbb A_K$ module

Bound on the inverse laplacian

Can we expect, $\left\|f|f|- g|g|\right\|\leq C \left \|f-g\right \|$ in the Banach algebra $A(\mathbb R)$?

The property of positive fourier series.

Closed ideal in $L^1(G)$

Rellich Integral Identity for Normal Derivatives

Harmonic functions are analytic

Characterization of spherical harmonics.

Distributional limit.

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