Sixth order non-dissipative C1-spline collocation method for oscillatory ordinary initial value problems

In this paper we construct a global method, based on quintic C-1-spline, for the integration of first order ordinary initial value problems (IVPs) including stiff equations and those possessing oscillatory solutions as well. The method will be shown to be of order six and in particular is Astable. Attention is also paid for the phase error (or dispersion) and it is proved that the method is dispersive and has dispersion order six with small phase-lag (compared with the extant methods having the same order (cf. [7])). Moreover, the method may be regarded as a continuous extension of the closed four-panel Newton-Cotes formula (NC4) (typically it is a continuous extension of an implicit Runge-Kutta method). In addition, a priori error estimates, in the uniform norm, together with illustrative test examples will also be presented.