List questions from delay-differential-equations

Published on 22 Mar 2026 - 19:28

160

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A property of eigenvalues of the generators of a strongly continuous semigroup

Published on 22 Mar 2026 - 22:27

49

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Confusion with differential equation's periodic solution

Published on 23 Mar 2026 - 11:15

129

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delayed differential equation: $øf(øx) = 2f(x)∫f(t)\,\mathrm{d}t$, integrated over $[0,x]$.

Published on 22 Mar 2026 - 17:37

37

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Solving a particular delay PDE $\partial_q f(q,s-1) = -\sqrt{s(2+s)}f(q,s)$

Published on 31 Jan 2023 - 16:18

55

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On periodic functions like $\sin$ and $\cos$

Published on 03 Mar 2023 - 1:10

146

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$y = y'(2x) / y'(x)$: A seemingly difficult pantograph-type equation that yields an elementary function as a solution.

Published on 01 Apr 2023 - 13:58

140

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Solving a tricky 4th order PDE.

Published on 04 Apr 2023 - 19:35

52

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How to find the characteristic equation of the following coupled time delayed system?

Published on 23 Apr 2023 - 8:40

51

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Crossing the limit cycle in a DDE

Published on 25 Mar 2026 - 16:05

83

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Are these smooth bump functions $\in C_{0}^{\infty}(-1,\ 1)$? $f(x) = \left(1+\exp\left(\frac{1-2|x|}{x^2-|x|}\right)\right)^{-1}$ and related

Published on 17 May 2023 - 3:14

50

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It is possible to solve this kind of ODE: $G''(w)+\left(\lambda^2-iw\mu \,e^{iw\mu}\right)G(w)=0$?

Published on 18 May 2023 - 5:43

129

Views

Heat equation derivation

Published on 30 May 2023 - 18:23

95

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On the solution to $u'(x)=2u(2x+1)-2u(2x-1)$ and the Fabius function

Published on 12 Jun 2023 - 2:09

36

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Derivation of expectation of random variable with delayed differential equation

Published on 16 Jun 2023 - 13:35

List Question

Proof of Coppel's Inequality for the matrix "measure".

A property of eigenvalues of the generators of a strongly continuous semigroup

Confusion with differential equation's periodic solution

delayed differential equation: $øf(øx) = 2f(x)∫f(t)\,\mathrm{d}t$, integrated over $[0,x]$.

Solving a particular delay PDE $\partial_q f(q,s-1) = -\sqrt{s(2+s)}f(q,s)$

On periodic functions like $\sin$ and $\cos$

$y = y'(2x) / y'(x)$: A seemingly difficult pantograph-type equation that yields an elementary function as a solution.

Solving a tricky 4th order PDE.

How to find the characteristic equation of the following coupled time delayed system?

Crossing the limit cycle in a DDE

Are these smooth bump functions $\in C_{0}^{\infty}(-1,\ 1)$? $f(x) = \left(1+\exp\left(\frac{1-2|x|}{x^2-|x|}\right)\right)^{-1}$ and related

It is possible to solve this kind of ODE: $G''(w)+\left(\lambda^2-iw\mu \,e^{iw\mu}\right)G(w)=0$?

Heat equation derivation

On the solution to $u'(x)=2u(2x+1)-2u(2x-1)$ and the Fabius function

Derivation of expectation of random variable with delayed differential equation

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