List questions from fourier-series

Published on 10 May 2026 - 12:52

98

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Check $\sum\limits_{p = 1}^\infty\frac{\sin(Qpa)}p\sin\left(\frac{qpa}2\right)^2=\frac\pi4\theta(Q-q)$

Published on 16 Apr 2026 - 23:11

185

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Fourier series: showing equality of operator norm

Published on 08 Apr 2026 - 20:09

89

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Does $e^{j2\pi kt} = (e^{j2\pi k})^t$?

Published on 12 Apr 2026 - 22:03

56

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Positivity of Fourier transform for extension of $1 - c x^2$?

Published on 16 Apr 2026 - 15:49

62

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Confusion about boundary conditions for a wave equation

Published on 10 May 2026 - 11:20

136

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Condition about equality between a function and his Fourier series

Published on 10 Apr 2026 - 16:46

1.2k

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Laurent series VS Fourier series.

Published on 07 May 2026 - 11:33

139

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What does $\langle f,g \rangle:=\frac{2}{T}\int f(x)g(x)dx, T>0$ mean?

Published on 16 Apr 2026 - 13:23

1.6k

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Retrieving function from Fourier coefficients $c_n=1/n$

Published on 16 Apr 2026 - 23:27

511

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boundness about Fejer kernel

Published on 09 Apr 2026 - 19:36

74

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Roots of a function with first Fourier coefficients equal

Published on 13 Apr 2026 - 19:31

125

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What is the sum of the series with general term $\frac{(-1)^{n-1}\pi^{2n-1}}{(2n-1)!}$

Published on 14 Apr 2026 - 7:08

252

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Fourier series, $a_0/2$ term

Published on 09 Apr 2026 - 17:23

372

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Squared Dirichlet integral.

Published on 10 Apr 2026 - 19:20

List Question

Lower bound on Fourier coefficients for a $C^\infty$ function

Check $\sum\limits_{p = 1}^\infty\frac{\sin(Qpa)}p\sin\left(\frac{qpa}2\right)^2=\frac\pi4\theta(Q-q)$

Fourier series: showing equality of operator norm

Does $e^{j2\pi kt} = (e^{j2\pi k})^t$?

Positivity of Fourier transform for extension of $1 - c x^2$?

Confusion about boundary conditions for a wave equation

Condition about equality between a function and his Fourier series

Laurent series VS Fourier series.

What does $\langle f,g \rangle:=\frac{2}{T}\int f(x)g(x)dx, T>0$ mean?

Retrieving function from Fourier coefficients $c_n=1/n$

boundness about Fejer kernel

Roots of a function with first Fourier coefficients equal

What is the sum of the series with general term $\frac{(-1)^{n-1}\pi^{2n-1}}{(2n-1)!}$

Fourier series, $a_0/2$ term

Squared Dirichlet integral.

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