By Pavel Drabek,Jaroslav Milota
In this booklet, the fundamental tools of nonlinear research are emphasised and illustrated in basic examples. each thought of approach is inspired, defined in a normal shape yet within the easiest attainable summary framework. Its functions are proven, fairly to boundary price difficulties for trouble-free usual or partial differential equations. The textual content is equipped in degrees: a self-contained uncomplicated and, prepared in appendices, a sophisticated point for the more matured reader. workouts are an natural a part of the exposition and accompany the reader through the book.