A PDE I can't solve by seperation of variables

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SUMMARY

The discussion centers on solving the partial differential equation (PDE) given by (b^2/a^2)(d^2 v/ d x^2) + (d^2 v/ d y^2) = -1. It is established that this PDE cannot be solved using separation of variables or similarity solutions. The constants a and b are confirmed to be constants, necessitating a change of variables to x' = x * b/a to transform the equation into the standard Poisson's equation.

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  • Understanding of partial differential equations (PDEs)
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  • Knowledge of similarity solutions in PDEs
  • Concept of standard Poisson's equation
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  • Study the derivation and applications of the standard Poisson's equation
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NapoleonZ
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Homework Statement





Homework Equations


After simplification, the PDE is

(b^2/a^2)(d^2 v/ d x^2) + (d^2 v/ d y^2) = -1

The Attempt at a Solution


Obviously, it can't be solved by separation of variables. And I also failed in similarity solution.
 
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Are a and b constants? If so, you need to change the x-scale: x = x' * b/a and get the standard Poisson's equation.
 
quZz said:
Are a and b constants? If so, you need to change the x-scale: x = x' * b/a and get the standard Poisson's equation.

Yes, they are.
 

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