I have a problem using NDSolve function (attachment) with a system of 6 coupled differential equations. Two of them have integral part in theme which have to be numerically computed before we can find a solution to the system. One of the parameters of the integral is a solution of the system in previous time step. So I defined two functions F and G as is written in attachment. I don't know what I did wrong, but I suspect there must be a problem with definition of function, because kernel gives me an error, basically saying I don't have numerically defined symbols.
What did I do wrong?
Attachment: dinamika.nb, URL: ,