Physics Bulletin "A nice introduction to the theory and practice of finding and using symmetries to solve differential equations." American Mathematical Monthly "...Stephani's book does a good job of ...

Many physical phenomena – including heat transfer, fluid flow and electromagnetic wave propagation, to name just three – can be described using partial differential equations (PDEs). Apart from a few ...

This book provides an introduction to the theory and application of the solution of differential equations using symmetries, a technique of great value in mathematics and the physical sciences. In ...