x-nullclines

Here we illustrate first for the -nullclines of the competing species example from the text:

> xNULLeqn := factor( rhs(ode1) ) = 0 ;

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

> xNULL1 := plot( [ 0, y, y=-2..4 ], color=GREEN ):

> xNULL2 := plot( 2-x, x=-2..4, color=GREEN ):

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

> xNULLplot;

>