y-nullclines

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

> factor( rhs(ode2) ) = 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] :

> yNULL1 := plot( %?, x = %? .. %?, color=BLUE ): # for a nullcline of the form y=F(x)

> yNULL2 := plot( [ %?, y, y = %? .. %? ], color=BLUE ): # for a nullcline of the form x=G(y)

> yNULLplot := display( [ yNULL1, yNULL2 ], axes=BOXED ): # display plot of each y-nullcline

> yNULLplot;

>