Question

The set $E=\{t\in [-\pi, \pi] : \exists \lim_{n\rightarrow+\infty}\sin(n_kt)\}$ is Lebesgue-measurable and $|E|=0$

score 64 · Answer 1 · 2026-04-16 14:31:02

64

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The set $E=\{t\in [-\pi, \pi] : \exists \lim_{n\rightarrow+\infty}\sin(n_kt)\}$ is Lebesgue-measurable and $|E|=0$

Published on 16 Apr 2026 - 14:31

score 43 · Answer 2 · 2026-04-11 19:10:09

43

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A question about engeinvalues for a PDE

Published on 11 Apr 2026 - 19:10

score 24 · Answer 3 · 2026-04-13 03:24:12

24

Views

Finding sum of fourier series given x = 2

Published on 13 Apr 2026 - 3:24

score 75 · Answer 4 · 2026-04-14 11:40:48

75

Views

Solving 1D heat equation with IC and BCs

Published on 14 Apr 2026 - 11:40

score 61 · Answer 5 · 2026-04-30 05:15:49

61

Views

Solve 4th order PDE using Finite Cosine Fourier Transform to verify solution

Published on 30 Apr 2026 - 5:15

score 107 · Answer 6 · 2026-04-09 18:20:43

107

Views

Fourier transform of an an (almost) periodic function

Published on 09 Apr 2026 - 18:20

score 95 · Answer 7 · 2026-04-10 21:54:14

95

Views

Fourier series and pre-Hilbert space

Published on 10 Apr 2026 - 21:54

score 41 · Answer 8 · 2026-04-17 15:31:55

41

Views

How to find Fourier series coefficients on interval $[\pi, 3\pi]$

Published on 17 Apr 2026 - 15:31

score 65 · Answer 9 · 2026-04-25 09:47:03

65

Views

Fourier tranform of decaying periodic function $f(t+k)=e^{-k^2/2}e^{-kt}f(t)$

Published on 25 Apr 2026 - 9:47

score 315 · Answer 10 · 2026-04-30 07:16:12

315

Views

Show the energy of a function $f(x) = a_k\cos(kx)+b_k\sin(kx)$ is $a_k^2 + b_k^2$

Published on 30 Apr 2026 - 7:16

score 732 · Answer 11 · 2026-05-11 01:10:00

732

Views

How to leave a trace of locus of parametric curve in desmos

Published on 11 May 2026 - 1:10

score 1.4k · Answer 12 · 2026-04-12 20:23:39

1.4k

Views

When does the Fourier series equal the original function?

Published on 12 Apr 2026 - 20:23

score 74 · Answer 13 · 2026-04-14 08:45:01

74

Views

Sum of series $\sum_{k=1}^{\infty} \frac{1}{k^2}=\frac{\pi^2}{6}$

Published on 14 Apr 2026 - 8:45

score 45 · Answer 14 · 2026-04-09 15:20:28

45

Views

Relationship between function and its Fourier transform multiplied by another function

Published on 09 Apr 2026 - 15:20

score 50 · Answer 15 · 2026-04-14 03:21:57

How is it possible to calculate the length of the interval on x axis, around point of discontinuity that is affected by Gibbs phenomenon?

List Question

The set $E=\{t\in [-\pi, \pi] : \exists \lim_{n\rightarrow+\infty}\sin(n_kt)\}$ is Lebesgue-measurable and $|E|=0$

A question about engeinvalues for a PDE

Finding sum of fourier series given x = 2

Solving 1D heat equation with IC and BCs

Solve 4th order PDE using Finite Cosine Fourier Transform to verify solution

Fourier transform of an an (almost) periodic function

Fourier series and pre-Hilbert space

How to find Fourier series coefficients on interval $[\pi, 3\pi]$

Fourier tranform of decaying periodic function $f(t+k)=e^{-k^2/2}e^{-kt}f(t)$

Show the energy of a function $f(x) = a_k\cos(kx)+b_k\sin(kx)$ is $a_k^2 + b_k^2$

How to leave a trace of locus of parametric curve in desmos

When does the Fourier series equal the original function?

Sum of series $\sum_{k=1}^{\infty} \frac{1}{k^2}=\frac{\pi^2}{6}$

Relationship between function and its Fourier transform multiplied by another function

How is it possible to calculate the length of the interval on x axis, around point of discontinuity that is affected by Gibbs phenomenon?

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