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De - Pt| English Dictionary: Banach space | by the DICT Development Group |
| 1 result for Banach space | |
| From The Free On-line Dictionary of Computing (15Feb98) [foldoc]: | |
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Banach space induced by the norm: d(x,y) = ||x-y||. Completeness means that every {Cauchy sequence} converges to an element of the space. All finite-dimensional {real} and {complex} normed vector spaces are complete and thus are Banach spaces. Using absolute value for the norm, the real numbers are a Banach space whereas the rationals are not. This is because there are sequences of rationals that converges to irrationals. Several theorems hold only in Banach spaces, e.g. the {Banach inverse mapping theorem}. All finite-dimensional real and complex vector spaces are Banach spaces. {Hilbert spaces}, spaces of {integrable functions}, and spaces of {absolutely convergent series} are examples of infinite-dimensional Banach spaces. Applications include {wavelets}, {signal processing}, and radar. [Robert E. Megginson, "An Introduction to Banach Space Theory", Graduate Texts in Mathematics, 183, Springer Verlag, September 1998]. (2000-03-10) | |
