List questions from fourier-series

Published on 14 Apr 2026 - 2:44

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Total variation of a Fourier series

Published on 09 Apr 2026 - 11:03

1.4k

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Show that $f_n = \sin(n\pi x)$ for $n\ge 1$ forms an orthonormal set in $C[0,1]$ with respect to the $L^2[0,1]$ norm.

Published on 16 Apr 2026 - 1:50

1.7k

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How many ways to calculate: $\sum_{n=-\infty}^{+\infty}\frac{1}{(u+n)^2}$ where $u \not \in \Bbb{Z}$

Published on 16 Apr 2026 - 0:10

3.9k

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Relationship between DFT index values, frequency in a Fourier series and Hz.

Published on 12 Apr 2026 - 3:26

279

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Series of Fourier coefficients

Published on 13 Apr 2026 - 23:41

323

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Prove complex Fourier Series in 2D

Published on 12 Apr 2026 - 13:14

5.9k

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Odd harmonics only in Fourier transform

Published on 11 Apr 2026 - 19:53

33.3k

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The Fourier series $\sum_{n=1}^\infty (1/n)\cos nx$

Published on 15 Apr 2026 - 20:17

2.1k

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Fourier series representation for $\sin(x/2)$

Published on 11 Apr 2026 - 18:15

21k

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Fourier series of function $f(x)=0$ if $-\pi<x<0$ and $f(x)=\sin(x)$ if $0<x<\pi$

Published on 16 Apr 2026 - 2:51

76

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A Fourier series $\frac{1}{1+t^2}$

Published on 17 Apr 2026 - 1:05

861

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Trigonometric Identities and Fourier Series

Published on 13 Apr 2026 - 15:55

1.8k

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Fourier Series and Inner Product

Published on 09 Apr 2026 - 8:06

3.7k

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Fourier and Legendre series

Published on 11 Apr 2026 - 7:37

List Question

Relations between complex functions satisfying a specific condition

Total variation of a Fourier series

Show that $f_n = \sin(n\pi x)$ for $n\ge 1$ forms an orthonormal set in $C[0,1]$ with respect to the $L^2[0,1]$ norm.

How many ways to calculate: $\sum_{n=-\infty}^{+\infty}\frac{1}{(u+n)^2}$ where $u \not \in \Bbb{Z}$

Relationship between DFT index values, frequency in a Fourier series and Hz.

Series of Fourier coefficients

Prove complex Fourier Series in 2D

Odd harmonics only in Fourier transform

The Fourier series $\sum_{n=1}^\infty (1/n)\cos nx$

Fourier series representation for $\sin(x/2)$

Fourier series of function $f(x)=0$ if $-\pi<x<0$ and $f(x)=\sin(x)$ if $0<x<\pi$

A Fourier series $\frac{1}{1+t^2}$

Trigonometric Identities and Fourier Series

Fourier Series and Inner Product

Fourier and Legendre series

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