"Version: 20200601"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. Brief outline of the book -- 1.2. What are complex systems? -- 1.3. Some approaches to complex or organised systems -- 1.4. Algorithmic information theory (AIT) -- 1.5. Algorithmic information theory and mathematics -- 1.6. Real-world systems2. Computation and algorithmic information theory -- 2.1.…