ODE2 - Not a proper differential equation?

#1 Posted: 2024/10/7 15:12:57

Cornel

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Hi,

Why is saying that its not a proper differential equation?

#2 Posted: 2024/10/7 17:20:54

StvMath

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Wrote
Hi,

Why is saying that its not a proper differential equation?

#3 Posted: 2024/10/7 17:56:58

Cornel

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And then if someone wants to solve a > 2 order differential equation (3th order, 4th order, etc), how to do it? What algorithm, command should I use/rely in SMath Studio?

#4 Posted: 2024/10/7 18:18:13

Вячеслав Мезенцев

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Russia ☭ forever, Viacheslav N. Mezentsev

#5 Posted: 2024/10/7 18:57:17

Cornel

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And there are also some approach using maxima engine/command?

#6 Posted: 2024/10/8 15:11:16

Martin Kraska

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Wrote
And there are also some approach using maxima engine/command?

Sure. Here is one using Maxima's desolve function and one using ODE.2 (without solving for the integration constants)

RLC.sm (23.17 KiB) downloaded 885 time(s).

Feder-Masse.sm (23.13 KiB) downloaded 930 time(s).

Martin KraskaPre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx

#7 Posted: 2024/10/9 14:42:41

Cornel

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Martin, do you have an example for a third order differential equation on how to solve it? because ode2 is limited to second order differentia eq as far as I understood. And my previous question was on how to sollve a differential eq of order > 2 (3, 4, etc)?

#8 Posted: 2024/10/9 18:47:10

Martin Kraska

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Here I cirumvent the limitations of the translation using multiple intervals of integration. Example from the interactive handbook.

Worksheet36.sm (40.73 KiB) downloaded 1219 time(s).

Martin KraskaPre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx

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