Defining the model

All differential equation models begin with a differential equation. If the problem is an intial value problem, an initial condition is also needed. Replace the question marks ( %? ) in the following input regions to define the relevant ODE model.

> ode1 := diff( x(t), t ) = 10*(y(t)-x(t)) :

> ode2 := diff( y(t), t ) = 28*x(t)-y(t)-x(t)*z(t) :

> ode3 := diff( z(t), t ) = -8/3*z(t) + x(t)*y(t) :

> MODEL := [ ode1, ode2, ode3 ] ;

> VAR := { x(t), y(t), z(t) } ;

>