How to Solve the Mixed Partial Differential Equation Given Boundary Conditions?

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SUMMARY

The discussion focuses on solving the mixed partial differential equation (PDE) represented as ∂²z / ∂x∂y = x²y. The general solution involves integrating the equation with respect to x and y sequentially, incorporating integration constants that are functions of the other variable. To find a particular solution that satisfies the boundary conditions z(x,0) = x² and z(1,y) = cos(y), users must determine the specific forms of these integration constants based on the provided conditions.

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  • Understanding of mixed partial differential equations
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  • Familiarity with boundary value problems
  • Basic concepts of integration constants in differential equations
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(∂^2)(z) / (∂x)(∂y) = (x^2)(y)

how do find the general solution of this equation?

and how do i find a particular solution for which

z(x,0) = x^2
z(1,y) = cosy

I have no idea!
 
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ArainGrass said:
(∂^2)(z) / (∂x)(∂y) = (x^2)(y)

how do find the general solution of this equation?

and how do i find a particular solution for which

z(x,0) = x^2
z(1,y) = cosy

I have no idea!

Welcome to PF, ArainGrass! :smile:

Integrate with respect to x and add an integration constant which is a function of y.
Integrate again with respect to y and add another integration constant which is a function of x.
Finally, find out what your integration-constant-functions are using your boundary conditions.
 

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