Numerical integration of stiff, sensitive and multivalued equations

A technique for the numerical integration of staff and multivalued ordinary differential equations has been developed. Any of the standard numerical integration methods (i.e., Runge Kutta, Adams-Moulton, etc.) may be employed. The technique utilizes a changeable independent variable of integration to conquer the numerical difficulties usually encountered in the integration of certain equations. Application of the method to several problems of interest to chemical engineers was made. In general, the technique works to increase accuracy and efficiency of solution.