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Simple question about Fourier transform

score 38 · Answer 1 · 2026-03-31 17:17:05

38

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Simple question about Fourier transform

Published on 31 Mar 2026 - 17:17

score 500 · Answer 2 · 2019-12-23 21:11:40

500

Views

Finding the Fourier series of $\frac{4-2\cos x}{5-4\cos x}$

Published on 23 Dec 2019 - 21:11

score 40 · Answer 3 · 2019-12-25 17:16:33

40

Views

Question about Fourier series of an integral function

Published on 25 Dec 2019 - 17:16

score 75 · Answer 4 · 2026-03-27 04:22:27

75

Views

Arbitrary initial function on heat equation

Published on 27 Mar 2026 - 4:22

score 337 · Answer 5 · 2026-03-25 17:45:18

337

Views

What are these Riemannian Ghosts?

Published on 25 Mar 2026 - 17:45

score 295 · Answer 6 · 2020-01-03 10:40:35

295

Views

Show the Fourier series converges pointwise to $f$, without using the fourier coefficients.

Published on 03 Jan 2020 - 10:40

score 724 · Answer 7 · 2020-01-06 03:03:07

724

Views

Fourier series of piecewise function $f(x)=\begin{cases}x;& x\in[-\pi,0]\\2x;&x\in[0,\pi]\end{cases}$ and convergence

Published on 06 Jan 2020 - 3:03

score 168 · Answer 8 · 2020-01-06 15:57:48

168

Views

Show that $|\sum_{k=1}^{n} |\sin{(k + \phi)}| \sin{(k + \phi)}| < M^*$

Published on 06 Jan 2020 - 15:57

score 270 · Answer 9 · 2020-01-09 17:57:58

270

Views

Proof of $\sum_{n= 0}^{\infty} \frac{\cos(nx)}{n!} = e^{\cos(x)} \cos(\sin x)$ without using complex numbers

Published on 09 Jan 2020 - 17:57

score 141 · Answer 10 · 2020-01-09 21:41:00

141

Views

Compute $\sum_{n=2}^\infty \frac{(-1)^n}{(n-1)(n+1)} $ and $\sum_{n=2} ^\infty \frac{1}{(n-1)^2(n+1)^2}$ using Fourier series

Published on 09 Jan 2020 - 21:41

score 160 · Answer 11 · 2026-03-27 04:24:15

160

Views

A doubt about the heat equation solution

Published on 27 Mar 2026 - 4:24

score 165 · Answer 12 · 2020-01-11 17:31:13

165

Views

Matching coefficients Fourier series when RHS and LHS have different periods

Published on 11 Jan 2020 - 17:31

score 141 · Answer 13 · 2020-01-11 18:41:21

141

Views

Fourier series inversion in arbitrary orthonormal complete basis of $L^2[0,1]$

Published on 11 Jan 2020 - 18:41

score 94 · Answer 14 · 2026-03-31 18:46:17

94

Views

what does fourier series really tell us? Why we needed to introduce that?

Published on 31 Mar 2026 - 18:46

score 41 · Answer 15 · 2026-03-27 18:01:42

41

Views

Fourier coefficients of $1-|t|$ with $t \in [-1,1]$

Published on 27 Mar 2026 - 18:01

List Question

Simple question about Fourier transform

Finding the Fourier series of $\frac{4-2\cos x}{5-4\cos x}$

Question about Fourier series of an integral function

Arbitrary initial function on heat equation

What are these Riemannian Ghosts?

Show the Fourier series converges pointwise to $f$, without using the fourier coefficients.

Fourier series of piecewise function $f(x)=\begin{cases}x;& x\in[-\pi,0]\\2x;&x\in[0,\pi]\end{cases}$ and convergence

Show that $|\sum_{k=1}^{n} |\sin{(k + \phi)}| \sin{(k + \phi)}| < M^*$

Proof of $\sum_{n= 0}^{\infty} \frac{\cos(nx)}{n!} = e^{\cos(x)} \cos(\sin x)$ without using complex numbers

Compute $\sum_{n=2}^\infty \frac{(-1)^n}{(n-1)(n+1)} $ and $\sum_{n=2} ^\infty \frac{1}{(n-1)^2(n+1)^2}$ using Fourier series

A doubt about the heat equation solution

Matching coefficients Fourier series when RHS and LHS have different periods

Fourier series inversion in arbitrary orthonormal complete basis of $L^2[0,1]$

what does fourier series really tell us? Why we needed to introduce that?

Fourier coefficients of $1-|t|$ with $t \in [-1,1]$

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