x-nullclines

The [Maple Math] -nullclines are found by setting the RHS of the first ODE equal to 0:

> factor( rhs(ode1) ) = 0 ;

The [Maple Math] -nullcline(s) typically consists of curves that can be expressed either as a function of [Maple Math] or as a function of [Maple Math] :

> xNULL1 := plot( ?, x = ? .. ?, color=GREEN ): # for a nullcline of the form y=F(x)

> xNULL2 := plot( [ ?, y, y = ? .. ? ], color=GREEN ): # for a nullcline of the form x=G(y)

> xNULLplot := display( [ xNULL1, xNULL2 ], axes=BOXED ):

> xNULLplot;

>