Question

how to reduce $f(x)$ to Fourier series?

score 290 · Answer 1 · 2026-03-26 21:25:51

290

Views

how to reduce $f(x)$ to Fourier series?

Published on 26 Mar 2026 - 21:25

score 47 · Answer 2 · 2026-04-09 15:55:59

47

Views

Integral of Fourier series and its partial sum

Published on 09 Apr 2026 - 15:55

score 81 · Answer 3 · 2026-03-31 11:35:14

81

Views

finding a constant $c$ so that $ \hat{f} (m)=0 $

Published on 31 Mar 2026 - 11:35

score 417 · Answer 4 · 2026-04-09 16:17:16

417

Views

What is the reason for the shape of these Fourier series graphs?

Published on 09 Apr 2026 - 16:17

score 56 · Answer 5 · 2026-04-11 20:27:41

56

Views

Interpretation of the Poisson's summation formula on $S^1$ by the geodesic flow

Published on 11 Apr 2026 - 20:27

score 489 · Answer 6 · 2026-04-11 20:15:32

489

Views

Does continuously differentiable imply the $\alpha$ order Holder condition for some $\alpha$?

Published on 11 Apr 2026 - 20:15

score 95 · Answer 7 · 2026-03-26 19:18:52

95

Views

Convolution of a sinc function with the FT of an arbitrary function behaving like a top hat near 0 is a sinc function. Where is the mistake?

Published on 26 Mar 2026 - 19:18

score 5.1k · Answer 8 · 2026-04-09 21:52:39

5.1k

Views

Simple proof of Inverse Discrete Fourier Transformation (IDFT)?

Published on 09 Apr 2026 - 21:52

score 200 · Answer 9 · 2026-04-03 16:13:59

200

Views

Fourier Expansion with period $4\pi$ and only odd indices

Published on 03 Apr 2026 - 16:13

score 160 · Answer 10 · 2019-11-29 09:08:02

160

Views

Prove that the following series converges to $1 - \frac{\pi}{4}$.

Published on 29 Nov 2019 - 9:08

score 153 · Answer 11 · 2026-04-03 16:15:42

153

Views

Sum $\sum _{n=1}^{\infty \:}\frac{\left(-1\right)^{n-1}}{\left(\left(2n-1\right)^2\right)}$

Published on 03 Apr 2026 - 16:15

score 90 · Answer 12 · 2026-04-12 00:59:31

90

Views

Scalar product for duality - symbol and adjoint operator problem

Published on 12 Apr 2026 - 0:59

score 139 · Answer 13 · 2026-04-12 00:51:36

139

Views

Question about the definition of Bessel potentials $H^{s, p}(\mathbb{R}^n)$ and their embeddings

Published on 12 Apr 2026 - 0:51

score 31 · Answer 14 · 2026-04-03 17:54:30

31

Views

Can we expect that $ \int_{\mathbb T} \left| \sum_{n\in \mathbb N} e^{-in^{r}} e^{inx} \right| dx $ is finite for some $r>0$?

Published on 03 Apr 2026 - 17:54

score 177 · Answer 15 · 2026-04-12 10:00:33

177

Views

Integrating the Fourier series term by term

Published on 12 Apr 2026 - 10:00

List Question

how to reduce $f(x)$ to Fourier series?

Integral of Fourier series and its partial sum

finding a constant $c$ so that $ \hat{f} (m)=0 $

What is the reason for the shape of these Fourier series graphs?

Interpretation of the Poisson's summation formula on $S^1$ by the geodesic flow

Does continuously differentiable imply the $\alpha$ order Holder condition for some $\alpha$?

Convolution of a sinc function with the FT of an arbitrary function behaving like a top hat near 0 is a sinc function. Where is the mistake?

Simple proof of Inverse Discrete Fourier Transformation (IDFT)?

Fourier Expansion with period $4\pi$ and only odd indices

Prove that the following series converges to $1 - \frac{\pi}{4}$.

Sum $\sum _{n=1}^{\infty \:}\frac{\left(-1\right)^{n-1}}{\left(\left(2n-1\right)^2\right)}$

Scalar product for duality - symbol and adjoint operator problem

Question about the definition of Bessel potentials $H^{s, p}(\mathbb{R}^n)$ and their embeddings

Can we expect that $ \int_{\mathbb T} \left| \sum_{n\in \mathbb N} e^{-in^{r}} e^{inx} \right| dx $ is finite for some $r>0$?

Integrating the Fourier series term by term

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