Ordinary differential control thPory (the classical theory) studies input/output re lations defined by systems of ordinary differential equations (ODE). The var

This book is devoted to explaining a wide range of applications of con tinuous symmetry groups to physically important systems of differential equations. Emphas

This book is a study of how a particular vision of the unity of mathematics, often called geometric function theory, was created in the 19th century. The centra

This text explores the essentials of partial differential equations as applied to engineering and the physical sciences. Discusses ordinary differential equatio

Lie's group theory of differential equations unifies the many ad hoc methods known for solving differential equations and provides powerful new ways to find sol