The Space and Motion of Communicating Agents

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Overview

The world is increasingly populated with interactive agents distributed in space, real or abstract. These agents can be artificial, as in computing systems that manage and monitor traffic or health; or they can be natural, e.g. communicating humans, or biological cells. It is important to be able to model networks of agents in order to understand and optimise their behaviour. Robin Milner's purpose is to describe in this book just such a model, and he does so by presenting a unified and rigorous structural theory, based on bigraphs, for systems of interacting agents. This theory is a bridge between the existing theories of concurrent processes and the aspirations for ubiquitous systems, whose enormous size challenges our understanding.

The book begins with an assessment of the problems that a structural model for distributed communicating systems must address. Bigraphs are introduced first informally, then rigorously, before being used to describe the configuration of component agents. The static theory of Part I gives way in Part II to examining the dynamics of interactions, leading to the notion of behavioural equivalence and its consequences.

The final Part explores a number of developments, in particular with regard to ubiquitous computing and biological systems. Ideas for future research and applications are presented.

The book is reasonably self-contained mathematically, and is designed to be learned from: examples and exercises abound, solutions for the latter are provided.

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Product Details

  • ISBN-13: 9780521490306
  • Publisher: Cambridge University Press
  • Publication date: 5/31/2009
  • Pages: 214
  • Product dimensions: 6.00 (w) x 9.00 (h) x 0.70 (d)

Meet the Author

Robin Milner is Professor Emeritus of Computer Science and Head of the Computer Laboratory at the University of Cambridge. He is a recipient of the A.M. Turing Award.

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Table of Contents

1 The idea of bigraphs 3

2 Defining bigraphs 14

3 Algebra for bigraphs 28

4 Relative and minimal bounds 39

5 Bigraphical structure 46

6 Sorting 59

7 Reactions and transitions 73

8 Bigraphical reactive systems 88

9 Behaviour in link graphs 100

10 Behavioural theory for CCS 110

11 Further topics 121

12 Background, development and related work 139

App. A Technical detail 147

App. B Solutions to exercises 162

Glossary of terms and symbols 177

References 180

Index 185

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