Daniel M. Kammen is Associate Professor of Energy and Society and director of the Renewable and Appropriate Energy Laboratory at the University of California, Berkeley. David M. Hassenzahl is Assistant Professor of Environmental Studies at the University of Nevada, Las Vegas. He has been an environmental risk professional in both the public and private sectors. Jurgen Moser, who died in 1999, was one of the most influential mathematicians of his generation. He made key contributions in dynamical systems and nonlinear analysis and was Director of the NYU Courant Institute, Director of the Research Institute for Mathematics at Switzerland's Federal Institute of Technology, and President of the International Mathematical Union. He received the 1994/95 Wolf Prize.

• Foreward ix I. INTRODUCTION 3 1. The stability problem 3 2. Historical comments 3 3. Other problems 8 4. Unstable and statistical behavior 14 5. Plan 18 II. STABILITY PROBLEM 21 1. A model problem in the complex 21 2. Normal forms for Hamiltonian and reversible systems 30 3. Invariant manifolds 38 4. Twist theorem 50 III. STATISTICAL BEHAVIOR 61 1. Bernoulli shift. Example 61 2. Shift as a topological mapping 66 3. Shift as a subsystem 68 4. Alternate conditions for C'-mappings 76 5. The restricted three-body problem 83 6. Homoclinic points 99 IV. FINAL REMARKS 113 V. EXISTENCE PROOF IN THE PRESENCE OF SMALL DIVISORS 113 1. Reformulation of Theorem 2.9 113 2. Construction of the root of a function 120 3. Proof of Theorem 5.1 127 4. Generalities 138 A. Appendix to Chapter V 149 a. Rate of convergence for scheme of s.2b) 149 b. The improved scheme by Hald 151 VI. PROOFS AND DETAILS FOR CHAPTER III 153 1. Outline 153 2. Behavior near infinity 154 3. Proof of Lemmas 1 and 2 of Chapter III 160 4. Proof of Lemma 3 of Chapter III 163 5. Proof of Lemma 4 of Chapter III 167 6. Proof of Lemma 5 of Chapter III 171 7. Proof of Theorem 3.7, concerning homoclinic points 181 8. Nonexistence of intergals 188 BOOKS AND SURVEY ARTICLES 191