y-nullclines

And, now, the same general steps for the [Maple Math] -nullclines:

> yNULLeqn := factor( rhs(ode2) ) = 0 ;

[Maple Math]

Thus, the [Maple Math] -nullcline consists of the two lines [Maple Math] and [Maple Math] . Here is how these might be plotted:

> yNULL1 := plot( 0, x=-5..15, color=BLUE ):

> yNULL2 := plot( 20-4*x, x=-5..15, color=BLUE ):

> yNULLplot := display( [ yNULL1, yNULL2 ], axes=BOXED ):

> #yNULLplot;

>