Question

Long time decay of wave equation : why is it $t^{-(n-1)/2}$ instead of $t^{-n/2}$?

score 75 · Answer 1 · 2026-04-11 15:12:32

75

Views

Long time decay of wave equation : why is it $t^{-(n-1)/2}$ instead of $t^{-n/2}$?

Published on 11 Apr 2026 - 15:12

score 175 · Answer 2 · 2026-04-12 18:10:44

175

Views

Limit of Fourier transform of indicator function

Published on 12 Apr 2026 - 18:10

score 82 · Answer 3 · 2021-08-06 10:49:27

82

Views

$2^{-n}\varphi(x/n) $ does not converge in $\mathscr{D}(\mathbb{R}^n)$

Published on 06 Aug 2021 - 10:49

score 148 · Answer 4 · 2021-08-06 14:17:02

148

Views

Vector valued line integral

Published on 06 Aug 2021 - 14:17

score 210 · Answer 5 · 2026-03-25 23:22:27

210

Views

Fourier transform of $ \frac{e^{-|\xi|^2 |t|}}{|\xi|^2} $

Published on 25 Mar 2026 - 23:22

score 71 · Answer 6 · 2026-03-28 05:23:26

71

Views

How to treat $\nabla \cdot \left ( \frac{\vec{r}}{\left | \vec{r} \right |^{3}} \right )= 4\pi \delta \left ( \vec{r} \right )$ numerically?

Published on 28 Mar 2026 - 5:23

score 122 · Answer 7 · 2026-03-27 17:52:28

122

Views

Approximate family of tempered distributions by Schwartz functions

Published on 27 Mar 2026 - 17:52

score 102 · Answer 8 · 2026-04-05 17:14:59

102

Views

Does the series $\sum \exp\{-(m!)!\}D^m\phi(0)$ converge for all smooth $\phi$?

Published on 05 Apr 2026 - 17:14

score 146 · Answer 9 · 2026-04-12 16:07:34

146

Views

Fourier Transform of $\frac{1}{|x|^2-1}$ in $\mathbb{R}^3$

Published on 12 Apr 2026 - 16:07

score 250 · Answer 10 · 2026-04-09 00:24:07

250

Views

On computing $\nabla^2 (1/4 \pi |x|)$ in three dimensions using mollifiers.

Published on 09 Apr 2026 - 0:24

score 60 · Answer 11 · 2021-08-16 09:09:40

60

Views

Is the limit in $pv\left( \frac{1}{x} \right)$ taken in the $L^2$ sense?

Published on 16 Aug 2021 - 9:09

score 110 · Answer 12 · 2021-08-17 10:38:47

110

Views

Two ways of computing $\lim_{a \to 0^+} \left( \frac{1}{(x+ia)^2} - \frac{1}{(x-ia)^2} \right)$ gives contradictory result

Published on 17 Aug 2021 - 10:38

score 76 · Answer 13 · 2026-04-05 09:40:04

76

Views

Derivative of Dirac delta composed with a function

Published on 05 Apr 2026 - 9:40

score 110 · Answer 14 · 2026-04-12 04:20:13

110

Views

Derivative of squared Heavyside function

Published on 12 Apr 2026 - 4:20

score 67 · Answer 15 · 2021-08-18 00:10:04

67

Views

If $\widehat{L(f)}=P\hat{f}$ then $\widehat{L(F)}=P\hat{F}$ in a distribution sense, where $P$ is characteristic polynomial?

Published on 18 Aug 2021 - 0:10

List Question

Long time decay of wave equation : why is it $t^{-(n-1)/2}$ instead of $t^{-n/2}$?

Limit of Fourier transform of indicator function

$2^{-n}\varphi(x/n) $ does not converge in $\mathscr{D}(\mathbb{R}^n)$

Vector valued line integral

Fourier transform of $ \frac{e^{-|\xi|^2 |t|}}{|\xi|^2} $

How to treat $\nabla \cdot \left ( \frac{\vec{r}}{\left | \vec{r} \right |^{3}} \right )= 4\pi \delta \left ( \vec{r} \right )$ numerically?

Approximate family of tempered distributions by Schwartz functions

Does the series $\sum \exp\{-(m!)!\}D^m\phi(0)$ converge for all smooth $\phi$?

Fourier Transform of $\frac{1}{|x|^2-1}$ in $\mathbb{R}^3$

On computing $\nabla^2 (1/4 \pi |x|)$ in three dimensions using mollifiers.

Is the limit in $pv\left( \frac{1}{x} \right)$ taken in the $L^2$ sense?

Two ways of computing $\lim_{a \to 0^+} \left( \frac{1}{(x+ia)^2} - \frac{1}{(x-ia)^2} \right)$ gives contradictory result

Derivative of Dirac delta composed with a function

Derivative of squared Heavyside function

If $\widehat{L(f)}=P\hat{f}$ then $\widehat{L(F)}=P\hat{F}$ in a distribution sense, where $P$ is characteristic polynomial?

Trending Questions

Popular # Hahtags

Popular Questions