List questions from fourier-series

Published on 25 Mar 2026 - 4:36

95

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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 06 Feb 2018 - 20:02

182

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Fourier series: showing equality of operator norm

Published on 22 Mar 2026 - 21:05

86

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

Published on 22 Mar 2026 - 19:31

53

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

Published on 17 Mar 2026 - 16:01

54

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Confusion about boundary conditions for a wave equation

Published on 24 Mar 2026 - 22:09

133

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Condition about equality between a function and his Fourier series

Published on 08 Feb 2018 - 13:54

1.2k

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Laurent series VS Fourier series.

Published on 25 Mar 2026 - 3:44

136

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

Published on 11 Feb 2018 - 0:58

1.6k

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

Published on 25 Mar 2026 - 4:36

507

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boundness about Fejer kernel

Published on 22 Mar 2026 - 0:41

71

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Roots of a function with first Fourier coefficients equal

Published on 14 Feb 2018 - 9:33

123

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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 25 Mar 2026 - 4:43

248

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Fourier series, $a_0/2$ term

Published on 21 Mar 2026 - 23:56

369

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Squared Dirichlet integral.

Published on 25 Mar 2026 - 2:56

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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