2207	 The Automatic Integration of Ordinary Differential Equations	 An integration technique for the automatic solution of an initial value problem for a set of ordinary differential equations is described. A criterion for the selection of the order of approximation is proposed. The objective of the criterion is to increase the step size so as to reduce solution time. An option permits the solution of stiff differential equations. A program embodying the techniques discussed appears in Algorithm . differential equations stiff equations integration step control order control
