Hi,

I am trying to reuse a function that I computed numerically (using dsolve).

My dsolve line is something like this

Sys:=dsolve({f1(0)=0,diff(f1(x),x)=...},{f1(x)},numeric}

Then I want to define a new function as follows:

g(x):=2*f1(x/2) and use it in solving another ODE system.

How can I do that?

I could solve the ODE only numerically.

Thank you.