Hello,

When doing a numerical solution to ODE using dsolve, I specify a ranges where I want the solution. Often time, I know that the solution only exist somewhere inside that range, for example, I often looking for valid solution where f(x) >= 0, and the numerical integration would fail beyond certain x. But I don't know what x is, so I just specify a range (by guessing) that contains x.

Maple / dsolve then would give an error like:

Hello,

I am wondering if this is possible. I have a system of ODE that I want to solve numerically, let say they should give me x(t) and y(t) (two first-order ODE). But instead of specifying the initial condition as initial value: y(0) = a, x(0) = b, I want to specify the end value, e.g: x(10) = a, y(10) = b and let dsolve/numeric integrate backward from t=10 to t=1. Is it possible ? how do I do that ?

Thanks.