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( %?, %? ) = %? ;

> ode2 := diff( %?, %? ) = %? ;

> MODEL := [ ode1, ode2 ] ; # define the differential equation model

> IC := [ %? = %?, %? = %? ] ; # specify an initial condition in the form h(0)=200, u(0)=5

> VAR := { %?, %? } ; # identify the variables in the model in the form h(t), u(t)

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