Abstract
Let E be a normed vector space (over the real or the complex numbers). We can define the notion of Cauchy sequence in E as we did for real sequences, and also the notion of convergent sequence (having a limit). If every Cauchy sequence converges, then E is said to be complete, and is also called a Banach space. A closed subspace of a Banach space is complete, hence it is also a Banach space.
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© 1993 Springer-Verlag Berlin Heidelberg
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Lang, S. (1993). Continuous Functions on Compact Sets. In: Real and Functional Analysis. Graduate Texts in Mathematics, vol 142. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-0897-6_3
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DOI: https://doi.org/10.1007/978-1-4612-0897-6_3
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-6938-0
Online ISBN: 978-1-4612-0897-6
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