Bøger af Dominique Perrin

Il y a un esprit bibliophile, il est fragile et nécessite un entretien constant, des sacrifices importants. Quelques uns l'acquièrent, bien peu le conservent. Ils ont le vernis et s'en targuent, ce n'est déjà pas si mal. Mais pour ceux qui ont franchi le cap, plus de marche arrière possible. Le virus est implacable. Ils sont nés à la bibliophilie, ils mourront avec. À ceux-là on peut parler de l'âme du bibliophile, cette entité éphémère et si difficile à définir et même à comprendre. Ce n'est plus d'eux dont il s'agit, enfin plus d'eux seuls, mais de la communion intime qui s'opère avec leurs livres. Ce livre est un voyage commenté dans le monde subtil de la bibliophilie.

This book describes the relation between profinite semigroups and symbolic dynamics. In particular, free profinite semigroups can be seen as the completion of free semigroups with respect to the profinite metric.

This major revision of Berstel and Perrin's classic Theory of Codes has been rewritten with a more modern focus and a much broader coverage of the subject. The concept of unambiguous automata, which is intimately linked with that of codes, now plays a significant role throughout the book, reflecting developments of the last 20 years. This is complemented by a discussion of the connection between codes and automata, and new material from the field of symbolic dynamics. The authors have also explored links with more practical applications, including data compression and cryptography. The treatment remains self-contained: there is background material on discrete mathematics, algebra and theoretical computer science. The wealth of exercises and examples make it ideal for self-study or courses. In sum this is a comprehensive reference on the theory of variable-length codes and their relation to automata.