Stability of collocation methods for the numerical solution ofy″=f (x,y)

The stability properties of the collocation methods using polynomials for the numerical solution ofy″=f(x,y) are studied in this paper. A simple procedure which can be used to determine the stability region of any method is presented. It is shown that all methods using points symmetrically placed in each subinterval are always stable at least in a finite interval. Some methods which have an infinite interval of stability are derived and their practical value is discussed.