In the mathematical discipline of measure theory, a Banach measure is a certain way to assign a size (or area) to all subsets of the Euclidean plane, consistent...
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The Banach–Tarski paradox is a theorem in set-theoretic geometry, which states the following: Given a solid ball in three-dimensional space, there exists...
48 KB (6,854 words) - 00:26, 20 October 2024
that bear Banach's name include Banach spaces, Banach algebras, Banach measures, the Banach–Tarski paradox, the Hahn–Banach theorem, the Banach–Steinhaus...
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specifically in functional analysis, a Banach space (pronounced [ˈbanax]) is a complete normed vector space. Thus, a Banach space is a vector space with a metric...
104 KB (17,224 words) - 06:29, 3 October 2024
In mathematics, especially functional analysis, a Banach algebra, named after Stefan Banach, is an associative algebra A {\displaystyle A} over the real...
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Hausdorff paradox (category Measure theory)
"area". (This Banach measure, however, is only finitely additive, so it is not a measure in the full sense, but it equals the Lebesgue measure on sets for...
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Lebesgue measure is a measure defined on infinite-dimensional normed vector spaces, such as Banach spaces, which resembles the Lebesgue measure used in...
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hence complex measures include finite signed measures but not, for example, the Lebesgue measure. Measures that take values in Banach spaces have been...
35 KB (5,554 words) - 21:47, 26 October 2024
The concentration of measure phenomenon was put forth in the early 1970s by Vitali Milman in his works on the local theory of Banach spaces, extending an...
10 KB (1,392 words) - 18:46, 13 January 2024
L-infinity (category Banach spaces)
measure space fulfills the conditions of being localizable and therefore semifinite). Pointwise multiplication gives them the structure of a Banach algebra...
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Functional analysis (section Banach spaces)
Examples of Banach spaces are L p {\displaystyle L^{p}} -spaces for any real number p ≥ 1 {\displaystyle p\geq 1} . Given also a measure μ {\displaystyle...
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Vitali set (category Measure theory)
one shows that each Vitali set has Banach measure 0. This does not create any contradictions since Banach measures are not countably additive, but only...
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geometry) Banach fixed-point theorem Banach game Banach lattice Banach limit Banach manifold Banach measure Banach space Banach coordinate space Banach disks...
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In measure theory, a branch of mathematics, the Lebesgue measure, named after French mathematician Henri Lebesgue, is the standard way of assigning a...
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finite signed measures becomes a Banach space. This space has even more structure, in that it can be shown to be a Dedekind complete Banach lattice and...
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Uniform boundedness principle (redirect from Banach-Steinhaus theorem)
boundedness principle or Banach–Steinhaus theorem is one of the fundamental results in functional analysis. Together with the Hahn–Banach theorem and the open...
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canonical Gaussian cylinder set measure on H. H. Satô, Gaussian Measure on a Banach Space and Abstract Wiener Measure, 1969. Dudley, Richard M.; Feldman...
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Reflexive space (redirect from Reflexive Banach space)
happens for example when μ {\displaystyle \mu } is a measure on a finite set). Likewise, the Banach space C ( [ 0 , 1 ] ) {\displaystyle C([0,1])} of continuous...
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Lp space (category Banach spaces)
class of Banach spaces in functional analysis, and of topological vector spaces. Because of their key role in the mathematical analysis of measure and probability...
69 KB (12,920 words) - 09:44, 17 October 2024
In the mathematical field of functional analysis, Banach spaces are among the most important objects of study. In other areas of mathematical analysis...
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Meagre set (redirect from Banach category theorem)
ISBN 978-3-540-64563-4. OCLC 246032063. Oxtoby, John C. (1980). "The Banach Category Theorem". Measure and Category (Second ed.). New York: Springer. pp. 62–65....
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analysis, a Banach limit is a continuous linear functional ϕ : ℓ ∞ → C {\displaystyle \phi :\ell ^{\infty }\to \mathbb {C} } defined on the Banach space ℓ...
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the push-forward and the standard Gaussian measure on the real line: a Borel measure γ on a separable Banach space X is called Gaussian if the push-forward...
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Absolute continuity (redirect from Absolutely continuous measure)
variation and has the Luzin N property. This statement is also known as the Banach-Zareckiǐ theorem. If f: I → R is absolutely continuous and g: R → R is globally...
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The Banach–Tarski Paradox is a book in mathematics on the Banach–Tarski paradox, the fact that a unit ball can be partitioned into a finite number of subsets...
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Radon–Nikodym theorem (redirect from Density function (measure theory))
Real analysis. Addison-Wesley. Contains a proof for vector measures assuming values in a Banach space. Royden, H. L.; Fitzpatrick, P. M. (2010). Real Analysis...
23 KB (3,596 words) - 08:59, 4 June 2024
Null set (redirect from Measure zero)
analysis, a null set is a Lebesgue measurable set of real numbers that has measure zero. This can be characterized as a set that can be covered by a countable...
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decomposition into finitely many pieces must preserve the sum of the Banach measures of the pieces, and therefore cannot change the total area of a set...
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In mathematics (specifically in measure theory), a Radon measure, named after Johann Radon, is a measure on the σ-algebra of Borel sets of a Hausdorff...
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In mathematical analysis, the Haar measure assigns an "invariant volume" to subsets of locally compact topological groups, consequently defining an integral...
32 KB (5,357 words) - 21:19, 16 October 2024