Ordinary Differential Equations

The author＇s book on GewShnliche Differentialgleichungen （Ordinary Differential Equations） was published in 1972. The present book is based on a translation of the latest， 6th， edition， which appeared in 1996， but it also treats some important subjects that are not found there. The German book is widely used as a textbook for a first course in ordinary differential equations. This is a rigorous course， and it contains some material that is more difficult than that usually found in a first course