Solving two simultaneous integro-differential equations

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SUMMARY

This discussion focuses on solving two simultaneous integro-differential equations involving functions u[x] and v[x]. The equations are defined with specific initial conditions and involve positive constants a, b, f, g, and e. The user concludes that an analytical solution is unlikely but successfully employs numerical methods using the NDSolve command in Mathematica 11 to find a solution after modifying the equations. The approach includes differentiating one equation to reduce the problem to a single function.

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Boudy
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I am trying to find a closed-form (analytical) solution for the two following simultaneous integro-differential equations :

du[x]/dx= - a v[x] +b ∫〖[1-(y-x)^4 〗].(v[y]-v[x])dy
And
(dv[x])/dx= - f u[x] -g ∫〖[1-(y-x)^4 〗].u[y]dy
With the initial conditions:
v[0]=e and u[1]=0
a,b,f,g and e are positive constants
Both integrals are from y=0 to y=1.
The unknowns are u[x] and v[x].
 
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an analytical expression for that set of equations is most likely not going to be found.
 
Just wrote down the start to a solution.
Differentiate one of the equations with respect to x. You already have expressions for du/dx and dv/dx, so when you differentiate you can substitute the other equation in. Voila! Suddenly you've got an integro-differential equation for only one function. I'll leave you to do the rest of it ;)
 
I thank both friends for their kind help. Fortunately, and after some modifications in the equations, a solution was possible using the numerical solution of two simultaneous differential equations in two variables and one single independent variable. This was done using the NDSolve command within a Mathematica 11 code.
Thanks again.
 

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