By Edwin Hewitt, Kenneth A. Ross

The booklet is predicated on classes given through E. Hewitt on the collage of Washington and the college of Uppsala. The ebook is meant to be readable via scholars who've had uncomplicated graduate classes in genuine research, set-theoretic topology, and algebra. that's, the reader should still be aware of straightforward set concept, set-theoretic topology, degree thought, and algebra. The publication starts with preliminaries in notation and terminology, staff idea, and topology. It maintains with parts of the idea of topological teams, the combination on in the community compact areas, and invariant functionals. The ebook concludes with convolutions and staff representations, and characters and duality of in the community compact Abelian teams.

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**Sample text**

Often, we shall simply ignore the indices specifying the chart maps and say that the local representative of f has a certain form, using the same notation for the map and its local representative. The map f : M -+ N is smooth at the point m E M if there is a local smooth representative of f at m. If fis smooth at any point of M we will simply say that f is smooth. 3 The submanifold property. Throughout this book various subsets of a given manifold will be studied. These will have different regularity properties.

Charts on a manifold Mare denoted by (V, cp), where V is an open subset of M and cp : V ~ Vi C E, E = jRn, for some n E N, is a homeomorphism onto an open set Vi in the Euc1idean space E. The number n, called the (loeal) dimension of M, is constant on each connected component of M. The vector space E is called the model spaee of the manifold M and one says that M is modeled on E. -P. , Momentum Maps and Hamiltonian Reduction © Juan Pablo Ortega and Tudor S. Ratiu 2004 2 Chapter 1. Manifolds and Smooth Structures functions on M will be denoted by COO(M).

The words non-Abelian appear in order to distinguish this notion from the classieal Abelian one due to Liouville, in which a cylinder (mostly a torus) is the symmetry group in question whose generators are given by the ftows of n independent integrals in involution, where n is the number of degrees of freedom of the system. 10 we shall briefty discuss aspects of integrable systems related to dual pairs and bifoliations, but the fuB theory is not presented. For example DUISTERMAAT (1980) analyzed the obstructions to the existence of global action-angle variables.