In this chapter we present the basic concepts on Banach algebras and C*-algebras, which are needed to understand many of the further topics in this book. In particular, we shall treat the basics of the Gelfand theory for commutative Banach algebras, and we shall give a proof of the Gelfand-Naimark theorem, which asserts that a commutative C*-algebra is naturally isomorphic to the algebra of continuous functions vanishing at infinity on a locally compact Hausdorff space.
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© 2009 Springer Science+Business Media, LLC
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(2009). Banach Algebras. In: Principles of Harmonic Analysis. Universitext. Springer, New York, NY. https://doi.org/10.1007/978-0-387-85469-4_2
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DOI: https://doi.org/10.1007/978-0-387-85469-4_2
Publisher Name: Springer, New York, NY
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Online ISBN: 978-0-387-85469-4
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