Question

Fourier Transform: Is there any intuitive/visual way I can understand how an integral of Cosines and Sines can give a non periodic function?

score 69 · Answer 1 · 2026-03-30 03:55:32

69

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Fourier Transform: Is there any intuitive/visual way I can understand how an integral of Cosines and Sines can give a non periodic function?

Published on 30 Mar 2026 - 3:55

score 62 · Answer 2 · 2022-09-14 02:07:47

62

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An Interesting phenomenon observed in a 10 by 6 matrix

Published on 14 Sep 2022 - 2:07

score 470 · Answer 3 · 2022-09-18 09:36:08

470

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Do functions defined on a torus have to be periodic?

Published on 18 Sep 2022 - 9:36

score 68 · Answer 4 · 2026-04-01 00:05:48

68

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Find a counterexample for this ODE.

Published on 01 Apr 2026 - 0:05

score 54 · Answer 5 · 2022-10-02 07:40:42

54

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Answer verification regarding fundamental period.

Published on 02 Oct 2022 - 7:40

score 109 · Answer 6 · 2022-10-02 09:02:16

109

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Examples of non-constant functions $f(x)$ such that $f(x)=f(\pi+x)=f(\pi-x)$

Published on 02 Oct 2022 - 9:02

score 60 · Answer 7 · 2022-10-02 14:25:31

60

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What would be the fundamental period of this discrete-time signal?

Published on 02 Oct 2022 - 14:25

score 149 · Answer 8 · 2022-10-04 06:47:05

149

Views

How do I show that $\sin(x^2+3x+2)$ is not periodic?

Published on 04 Oct 2022 - 6:47

score 195 · Answer 9 · 2022-10-13 18:48:03

195

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Period of a complex function

Published on 13 Oct 2022 - 18:48

score 29 · Answer 10 · 2022-10-14 17:22:40

29

Views

What is $\max_{x\in\mathbb R}\int_0^T f(t)f(t+x)\,dt$ with $f\in C^0(\mathbb R)$ and $T$ periodic?

Published on 14 Oct 2022 - 17:22

score 78 · Answer 11 · 2022-10-19 21:51:13

78

Views

Solutions to Hill equation with two coefficients

Published on 19 Oct 2022 - 21:51

score 243 · Answer 12 · 2026-03-28 09:33:40

243

Views

Periods and $\mathscr{P}(w)$ of the elliptic curve $y^2=4(x-1)(x-2)(x-3)$

Published on 28 Mar 2026 - 9:33

score 62 · Answer 13 · 2022-10-22 20:20:42

62

Views

Fundamental period of sum of sinusoids

Published on 22 Oct 2022 - 20:20

score 125 · Answer 14 · 2022-10-30 06:33:37

125

Views

Prove solutions for $y'' = -y^3$ are periodic

Published on 30 Oct 2022 - 6:33

score 104 · Answer 15 · 2022-10-30 08:07:46

104

Views

If there is a sequence of zeros of a function and this sequence tends to $0$, then is $f$ not periodic, true or false?

Published on 30 Oct 2022 - 8:07

List Question

Fourier Transform: Is there any intuitive/visual way I can understand how an integral of Cosines and Sines can give a non periodic function?

An Interesting phenomenon observed in a 10 by 6 matrix

Do functions defined on a torus have to be periodic?

Find a counterexample for this ODE.

Answer verification regarding fundamental period.

Examples of non-constant functions $f(x)$ such that $f(x)=f(\pi+x)=f(\pi-x)$

What would be the fundamental period of this discrete-time signal?

How do I show that $\sin(x^2+3x+2)$ is not periodic?

Period of a complex function

What is $\max_{x\in\mathbb R}\int_0^T f(t)f(t+x)\,dt$ with $f\in C^0(\mathbb R)$ and $T$ periodic?

Solutions to Hill equation with two coefficients

Periods and $\mathscr{P}(w)$ of the elliptic curve $y^2=4(x-1)(x-2)(x-3)$

Fundamental period of sum of sinusoids

Prove solutions for $y'' = -y^3$ are periodic

If there is a sequence of zeros of a function and this sequence tends to $0$, then is $f$ not periodic, true or false?

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