This is my problem:
I have to solve a differential-equation-system, and then to plot the results. The system is :
It's about epidemiology, S, J, and R are the Susceptible, Infected, and Retired people, while a and r are two parameters that I determined before.
The thing is, when I give as initial conditions the 3 values at t=0, everything is OK, but I don't know these 3 values ! So I'd like to give Maple other values, as the derivate of one of the functions at some point, or this sort of thing... But Maple doesn't accept, whatever my syntax is. I've tried many ways, and already checked the online help that they provide, but didn't find anything helpful. Does anybody know how to fix that issue?
Thank you :)