![]() This book gives the careful reader working knowledge in a wide range of topics of modern coordinate-free differential geometry in not too many pages. Symplectic and Poisson geometry emphasizes group actions, momentum mappings, and reductions. The Jacobi flow on the second tangent bundle is a new aspect coming from this point of view. Riemann geometry starts with a careful treatment of connections to geodesic structures to sprays to connectors and back to connections, going via the second and third tangent bundles. ![]() The Frolicher-Nijenhuis bracket for tangent bundle valued differential forms is used to express any kind of curvature and second Bianchi identity, even for fiber bundles (without structure groups). De Rham cohomology includes that of compact Lie groups, leading to the study of (nonabelian) extensions of Lie algebras and Lie groups. Lie groups and their actions are treated early on, including the slice theorem and invariant theory. Some attractive unusual aspects of this book are as follows: Initial submanifolds and the Frobenius theorem for distributions of nonconstant rank (the Stefan-Sussman theory) are discussed. Coordinate formulas are always derived as extra information. The layout of the material stresses naturality and functoriality from the beginning and is as coordinate-free as possible. This book treats the fundamentals of differential geometry: manifolds, flows, Lie groups and their actions, invariant theory, differential forms and de Rham cohomology, bundles and connections, Riemann manifolds, isometric actions, and symplectic and Poisson geometry.
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