"The book is a compendium of the state of knowledge about viability...Mathematically, the book should be accessible to anyone who has had basic graduate courses in modern analysis and functional analysisâ ¦The concepts are defined and many proofs of the requisite results are reproduced here, making the present book essentially self-contained." â Bulletin of the AMS "Because of the wide scope, the book is an ideal reference for people encountering problems related to viability theory in their researchâ ¦It gives a very thorough mathematical presentation. Very useful for anybody confronted with viability constraints." â Mededelingen van het Wiskundig Genootschap