Introduction to the Qualitative Theory of Differential Systems

Jaume Llibre is full professor at the Autonomous University of Barcelona (Spain) and a member of the Royal Academy of Sciences and Arts of Barcelona. He was a long-term visitor at different important universities and research institutes and is the author of many papers and some books. His main results deal with the periodic orbits either of different kinds of self-maps, or of vector fields, Hamiltonian systems and celestial mechanics. Antonio E. Teruel is associated professor at the University of the Balear Islands (Spain). He is the author of some papers about piecewise linear differential systems. His main results deal with piecewise linear models of differential behaviors.

From the book reviews: "This book is devoted to the study of piecewise linear differential systems (PWLSs), from the point of view of the qualitative theory of differential equations. ... this book could serve well both as a textbook for a course in piecewise linear differential equations and as a reference in which important tools of current research are thoroughly explained and their use is illustrated." (Claudio Pessoa, Mathematical Reviews, November, 2014) "The monograph presents a detailed study of an important family of continuous piecewise linear differential systems. ... The book is of great interest for researches working on planar piecewise linear differential systems. It can also serve as a reference book for those interested in the global phase portraits and the bifurcation sets of fundamental systems. The book is also highly suitable for students and engineers wishing to learn the theory of planar piecewise linear systems ... ." (Valery Romanovski, zbMATH, Vol. 1286 (2), 2014)

• Preface.- 1 Introduction and statement of the main results.- 2 Basic elements of the qualitative theory of ODEs.- 3 Fundamental systems.- 4 Return maps.- 5 Phase portraits.- Index.- Bibliography.​