Differential Equations: 3rd Edition This book contains basic methods, theory and applications of elementary differential equations. Part I of this book includes all the basic material found in a one semester introductory course in ordinary differential equations. Part II introduces students to certain specialized and more advanced methods, as well as providing a systematic introduction to fundamental theory. Contents Part I Fundamental Methods And Applications · First-Order Equations for Which Exact Solutions Are Obtainable · Explicit Methods of Solving Higher-Order Linear Differential Equations · Series Solutions of Linear Differential Equations · Approximate Methods of Solving First-Order Equations Part II Fundamental Theory And Further Methods · Existence and Uniqueness Theory ·