Our purpose in writing this book is to present a universal theory of
automata which on one hand unifies the theories of several well-known
types of automata and on the other hand allows interesting new
applications and results. The frame- work for our development is
category theory, especially universal constructions in monoidal
categories. But we will carefully motivate and introduce all those (and
only those) notions and results of category theory which are needed in
our approach. The reader is only assumed to be familiar with sets,
deterministic functions, relations and the basic no- tions of structural
mathematics. However, some knowledge of discrete probability
distributions, linear algebra and general topology would be useful in
understanding the corre- sponding applications and in having a better
background for the general theory. All our constructions and results are
motivated and interpreted carefully with respect to the classical theory
of deterministic, partial, linear, topolog- ical, nondeterministic,
relational and stochastic automata. The book is mainly devoted to
students of theoretical com- puter science or mathematics and can be
used as a textbook in graduate courses or seminars. On the other hand it
will also be useful for many other people, who are concerned with the
interesting new research area of category theory applied to computation
and control.