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AuthorPaternain, Gabriel P. author
TitleGeodesic Flows [electronic resource] / by Gabriel P. Paternain
ImprintBoston, MA : Birkhรคuser Boston : Imprint: Birkhรคuser, 1999
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Descript XIII, 149 p. online resource


The aim of this book is to present the fundamental concepts and properties of the geodesic flow of a closed Riemannian manifold. The topics covered are close to my research interests. An important goal here is to describe properties of the geodesic flow which do not require curvature assumptions. A typical example of such a property and a central result in this work is Mane's formula that relates the topological entropy of the geodesic flow with the exponential growth rate of the average numbers of geodesic arcs between two points in the manifold. The material here can be reasonably covered in a one-semester course. I have in mind an audience with prior exposure to the fundamentals of Riemannian geometry and dynamical systems. I am very grateful for the assistance and criticism of several people in preparing the text. In particular, I wish to thank Leonardo Macarini and Nelson Moller who helped me with the writing of the first two chapters and the figures. Gonzalo Tomaria caught several errors and contributed with helpful suggestions. Pablo Spallanzani wrote solutions to several of the exercises. I have used his solutions to write many of the hints and answers. I also wish to thank the referee for a very careful reading of the manuscript and for a large number of comments with corrections and suggestions for improvement


0 Introduction -- 1 Introduction to Geodesic Flows -- 1.1 Geodesic flow of a complete Riemannian manifold -- 1.2 Symplectic and contact manifolds -- 1.3 The geometry of the tangent bundle -- 1.4 The cotangent bundle T*M -- 1.5 Jacobi fields and the differential of the geodesic flow -- 1.6 The asymptotic cycle and the stable norm -- 2 The Geodesic Flow Acting on Lagrangian Subspaces -- 2.1 Twist properties -- 2.2 Riccati equations -- 2.3 The Grassmannian bundle of Lagrangian subspaces -- 2.4 The Maslov index -- 2.5 The geodesic flow acting at the level of Lagrangian subspaces -- 2.6 Continuous invariant Lagrangian subbundles in SM -- 2.7 Birkhoffโ{128}{153}s second theorem for geodesic flows -- 3 Geodesic Arcs, Counting Functions and Topological Entropy -- 3.1 The counting functions -- 3.2 Entropies and Yomdinโ{128}{153}s theorem -- 3.3 Geodesic arcs and topological entropy -- 3.4 Manningโ{128}{153}s inequality -- 3.5 A uniform version of Yomdinโ{128}{153}s theorem -- 4 Maรฑรฉโ{128}{153}s Formula for Geodesic Flows and Convex Billiards -- 4.1 Time shifts that avoid the vertical -- 4.2 Maรฑรฉโ{128}{153}s formula for geodesic flows -- 4.3 Manifolds without conjugate points -- 4.4 A formula for the topological entropy for manifolds of positive sectional curvature -- 4.5 Maรฑรฉโ{128}{153}s formula for convex billiards -- 4.6 Further results and problems on the subject -- 5 Topological Entropy and Loop Space Homology -- 5.1 Rationally elliptic and rationally hyperbolic manifolds -- 5.2 Morse theory of the loop space -- 5.3 Topological conditions that ensure positive entropy -- 5.4 Entropies of manifolds -- 5.5 Further results and problems on the subject -- Hints and Answers -- References

Mathematics Dynamics Ergodic theory Global analysis (Mathematics) Manifolds (Mathematics) Differential geometry Topology Mathematics Differential Geometry Global Analysis and Analysis on Manifolds Topology Dynamical Systems and Ergodic Theory


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