Question

An identity for Fourier transform of measure

score 200 · Answer 1 · 2019-03-20 01:09:35

200

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An identity for Fourier transform of measure

Published on 20 Mar 2019 - 1:09

score 325 · Answer 2 · 2026-03-30 08:05:48

325

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Converse of Fejer's Theorem

Published on 30 Mar 2026 - 8:05

score 710 · Answer 3 · 2026-04-01 14:08:35

710

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Fourier transform of a random walk

Published on 01 Apr 2026 - 14:08

score 197 · Answer 4 · 2019-03-20 17:00:59

197

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Show this function is a good kernel on unit disk

Published on 20 Mar 2019 - 17:00

score 79 · Answer 5 · 2026-03-28 21:51:31

79

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$f(x) = \sum_{n=1}^\infty \sin (n x) / n^2 $ not differentiable at $x=0 $.

Published on 28 Mar 2026 - 21:51

score 302 · Answer 6 · 2026-03-29 08:44:27

302

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What is the minimal requirement for a Fourier transformation?

Published on 29 Mar 2026 - 8:44

score 62 · Answer 7 · 2026-03-30 12:52:35

62

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Why can you replace $1/\sin(\phi/2)$ with $2/\phi$ in an integral?

Published on 30 Mar 2026 - 12:52

score 92 · Answer 8 · 2026-03-29 06:55:41

92

Views

Sign convention for Fourier transform and contour integration - example

Published on 29 Mar 2026 - 6:55

score 261 · Answer 9 · 2026-03-28 23:33:54

261

Views

Why are the limits of the fourier cosine/sine series [0,∞) while the limits of the fourier exponential series are (-∞,∞)?

Published on 28 Mar 2026 - 23:33

score 84 · Answer 10 · 2019-03-23 04:19:32

84

Views

Convergence of Hermitian inner product in $l^2(\mathbb{Z})$

Published on 23 Mar 2019 - 4:19

score 36 · Answer 11 · 2019-03-23 06:52:41

36

Views

Showing $||f - S_{n}(f)||_{2}^{2}$ $=$ $||f||_{2}^{2}$ $-$ $||S_{n}(f)||_{2}^{2}$

Published on 23 Mar 2019 - 6:52

score 483 · Answer 12 · 2026-03-29 07:00:37

483

Views

Ηow do I find the Fourier transform of the cardinal sine?

Published on 29 Mar 2026 - 7:00

score 1.2k · Answer 13 · 2026-03-26 03:12:54

1.2k

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Discrete-time Fourier transform of $x[n] = 1$

Published on 26 Mar 2026 - 3:12

score 70 · Answer 14 · 2019-03-24 15:36:04

70

Views

How can I show that particular functions are in the Schwartz class $\mathcal {S}(\mathbb{R} ^n)$?

Published on 24 Mar 2019 - 15:36

score 391 · Answer 15 · 2026-03-30 23:04:10

391

Views

Maximum/minimum values for two-dimensional type-II discrete cosine transform matrix

Published on 30 Mar 2026 - 23:04

List Question

An identity for Fourier transform of measure

Converse of Fejer's Theorem

Fourier transform of a random walk

Show this function is a good kernel on unit disk

$f(x) = \sum_{n=1}^\infty \sin (n x) / n^2 $ not differentiable at $x=0 $.

What is the minimal requirement for a Fourier transformation?

Why can you replace $1/\sin(\phi/2)$ with $2/\phi$ in an integral?

Sign convention for Fourier transform and contour integration - example

Why are the limits of the fourier cosine/sine series [0,∞) while the limits of the fourier exponential series are (-∞,∞)?

Convergence of Hermitian inner product in $l^2(\mathbb{Z})$

Showing $||f - S_{n}(f)||_{2}^{2}$ $=$ $||f||_{2}^{2}$ $-$ $||S_{n}(f)||_{2}^{2}$

Ηow do I find the Fourier transform of the cardinal sine?

Discrete-time Fourier transform of $x[n] = 1$

How can I show that particular functions are in the Schwartz class $\mathcal {S}(\mathbb{R} ^n)$?

Maximum/minimum values for two-dimensional type-II discrete cosine transform matrix

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