Question

Density of $C_c^{\infty}(\mathbb{R}^2)$ in Sobolev space $H^{\frac{1}{2}}$

score 51 · Answer 1 · 2026-04-11 02:00:47

51

Views

Density of $C_c^{\infty}(\mathbb{R}^2)$ in Sobolev space $H^{\frac{1}{2}}$

Published on 11 Apr 2026 - 2:00

score 45 · Answer 2 · 2026-04-10 20:35:58

45

Views

Struggling with an identity which uses fourier expansions.

Published on 10 Apr 2026 - 20:35

score 109 · Answer 3 · 2026-04-14 02:08:33

109

Views

Order of evaluation for summing over integers

Published on 14 Apr 2026 - 2:08

score 88 · Answer 4 · 2026-04-12 06:24:42

88

Views

Convergence Properties of Fourier coefficients

Published on 12 Apr 2026 - 6:24

score 1.3k · Answer 5 · 2026-04-15 07:07:43

1.3k

Views

Does the Fourier transform map $L^1(\mathbb{R})$ into itself?

Published on 15 Apr 2026 - 7:07

score 56 · Answer 6 · 2026-04-14 05:53:41

56

Views

Showing CTFT without CTFS

Published on 14 Apr 2026 - 5:53

score 345 · Answer 7 · 2026-04-14 03:14:47

345

Views

When to use phasor diagrams and when to use formulas to figure out Magnitude and Phase of a complex number

Published on 14 Apr 2026 - 3:14

score 9.7k · Answer 8 · 2026-04-08 19:51:04

9.7k

Views

What is spectral leakage?

Published on 08 Apr 2026 - 19:51

score 976 · Answer 9 · 2026-04-12 20:07:20

976

Views

Is a sinusoidal signal the only one not distorted by an LTI system?

Published on 12 Apr 2026 - 20:07

score 173 · Answer 10 · 2026-04-12 04:56:53

173

Views

Fourier series of derivative

Published on 12 Apr 2026 - 4:56

score 131 · Answer 11 · 2026-04-15 15:56:07

131

Views

Integer translations of $L^2(\mathbb{R})$ functions can never be complete in $L^2(\mathbb{R})$

Published on 15 Apr 2026 - 15:56

score 40 · Answer 12 · 2026-04-16 07:11:41

40

Views

Showing $\mathcal{F}(f\circ R_{\theta})=(\mathcal{F}f)\circ R_{\theta}$

Published on 16 Apr 2026 - 7:11

score 758 · Answer 13 · 2026-04-15 05:42:34

758

Views

Using the Plancherel formula to evaluate $\int_{-\infty}^{\infty}\frac{1}{(1+x^{2})^{2}}\,dx$

Published on 15 Apr 2026 - 5:42

score 118 · Answer 14 · 2026-04-13 10:46:41

118

Views

"Fourier coefficients" of a sequence of uniformly Lipschitz functions

Published on 13 Apr 2026 - 10:46

score 5.4k · Answer 15 · 2026-04-29 01:52:19

5.4k

Views

How do I find the magnitude and phase of the frequency response function for a third order system using transfer functions?

Published on 29 Apr 2026 - 1:52

List Question

Density of $C_c^{\infty}(\mathbb{R}^2)$ in Sobolev space $H^{\frac{1}{2}}$

Struggling with an identity which uses fourier expansions.

Order of evaluation for summing over integers

Convergence Properties of Fourier coefficients

Does the Fourier transform map $L^1(\mathbb{R})$ into itself?

Showing CTFT without CTFS

When to use phasor diagrams and when to use formulas to figure out Magnitude and Phase of a complex number

What is spectral leakage?

Is a sinusoidal signal the only one not distorted by an LTI system?

Fourier series of derivative

Integer translations of $L^2(\mathbb{R})$ functions can never be complete in $L^2(\mathbb{R})$

Showing $\mathcal{F}(f\circ R_{\theta})=(\mathcal{F}f)\circ R_{\theta}$

Using the Plancherel formula to evaluate $\int_{-\infty}^{\infty}\frac{1}{(1+x^{2})^{2}}\,dx$

"Fourier coefficients" of a sequence of uniformly Lipschitz functions

How do I find the magnitude and phase of the frequency response function for a third order system using transfer functions?

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