Linearization of nonlinear non homogenous ODE

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Discussion Overview

The discussion revolves around the linearization and potential solutions for a specific nonlinear non-homogeneous ordinary differential equation (ODE) given by A*dy/dt + B*y^(4) = C, where A, B, and C are constants. Participants explore various methods for solving the equation, including transformations and comparisons to known types of differential equations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant seeks assistance in linearizing the given ODE and inquires about its reduction to a Riccati equation.
  • Another participant confirms the form of the differential equation and suggests it can be expressed as a Bernoulli equation, proposing a direct solution approach.
  • A subsequent reply challenges the applicability of the Bernoulli equation, stating that the original equation cannot be transformed into that form and requests suggestions for transformation.
  • Another participant observes that the equation is separable and mentions that while the resulting integral may be complex, it is still solvable.
  • One participant references the Chini equation from the literature, noting its similarity to the discussed ODE and expresses difficulty in finding its solution.
  • A later reply reiterates the separability of the equation and provides a method for integration using partial fractions.

Areas of Agreement / Disagreement

Participants express differing views on the applicability of the Bernoulli equation and the methods for solving the ODE. While some agree on the separability of the equation, there is no consensus on the best approach to take for solving it.

Contextual Notes

Some participants highlight the complexity of the integrals involved and the challenges in transforming the equation into a more manageable form. The discussion reflects various assumptions about the nature of the equation and its solutions.

Who May Find This Useful

Readers interested in nonlinear differential equations, methods of solving ODEs, and those exploring mathematical transformations in differential equations may find this discussion relevant.

mike79
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Hi everybody,
could anyone help me in the linearization of the following non linear non-homogeneous ODE?

A*dy/dt+B*y^(4)=C

where A, B and C are constants. y is a function of t. is it possible to reduce this equation to a Riccati equation? do you know any analytical, approximate or not, methods to solve the equation?

thanks in advance
 
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Just to be clear, is this the DE:

[tex]A \frac{dy}{dt} + By^4 = C[/tex]

If so, then note that you can easily express it as a http://en.wikipedia.org/wiki/Bernoulli_differential_equation" and solve it directly without having to approximate it.
 
Last edited by a moderator:
the DE is right...the BERNOULLI equation is homogeneous and I actually can't tarnsform my equation in a Bernoulli one. can you suggest me how to transform it?
 
I just had a second look at the DE and realized that there is no need to solve it as a Bernoulli DE. The original DE is separable, though the resulting integral is a little tough to integrate, but certainly doable.
 
i have found in literature the Chini equation, which is similar to the equation I'm trying to solve. unfortunately i can't found the solution. can everyone help me, please?
 
Defennder has already pointed out that this equation is separable:
[tex]/frac{Ady}{C- By^4}= dt[/tex]
Integrate both sides, using "partial fractions" on the left.
 

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