| Author |
Comment/Response |
Shahriar
|
 01/10/09 5:35pm
Here is a simple case from my previous post that id like to solve.
y''[x]==y+z'[x]
z[x]^3=y'[x]+3
With boundary conditions of y[1]==2 and y[0]==3
Using NDSolve on these equations, Mathematica says the order of the equations is 3 and it has only 2 initial conditions. But the order of this system of equations is 2 as far as I see (since order is defined as the highest derivative)
When I do try to put another boundary condition in like z[0]==0 Mathematica spits out that it cant solve for the derivatives and is using a mass matrix method (error:ntdvmm) and then it says that it has significant errors (error:berr) and will return the best solution found.
Any help on this matter will be greatly appreciated.
Thanks
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