Integro-differential systems

Hi everyone.

I have a question about integro-differential systems.

I have to compute something like:

dx/dt = psi(t)-x(t)

with

psi(t)=integral (from 0 to t) of x(s) ds

How can I do that?

Answer 1

[Torsten]

Solve

d(psi)/dt = x(t), psi(0)=0
dx/dt = psi(t) - x(t), x(0) = ?

Best wishes

Torsten.