Maximal seminorms on Weak
Michael Cwikel, Charles Fefferman (1981)
Studia Mathematica
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Michael Cwikel, Charles Fefferman (1981)
Studia Mathematica
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Denny Leung (1997)
Studia Mathematica
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Let (Ω,∑,μ) be a purely non-atomic measure space, and let 1 < p < ∞. If is isomorphic, as a Banach space, to for some purely atomic measure space (Ω’,∑’,μ’), then there is a measurable partition such that is countably generated and σ-finite, and that μ(σ) = 0 or ∞ for every measurable . In particular, is isomorphic to .
Robert Fefferman, Fernando Soria (1987)
Studia Mathematica
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M. Rao (1970)
Studia Mathematica
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Janusz Matkowski (1994)
Studia Mathematica
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Let (Ω,Σ,μ) be a measure space with two sets A,B ∈ Σ such that 0 < μ (A) < 1 < μ (B) < ∞ and suppose that ϕ and ψ are arbitrary bijections of [0,∞) such that ϕ(0) = ψ(0) = 0. The main result says that if for all μ-integrable nonnegative step functions x,y then ϕ and ψ must be conjugate power functions. If the measure space (Ω,Σ,μ) has one of the following properties: (a) μ (A) ≤ 1 for every A ∈ Σ of finite measure; (b) μ (A) ≥ 1 for every A ∈ Σ of positive measure, then...
J. M. Coron (1984)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Gord Sinnamon (2001)
Publicacions Matemàtiques
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An exact expression for the down norm is given in terms of the level function on all rearrangement invariant spaces and a useful approximate expression is given for the down norm on all rearrangement invariant spaces whose upper Boyd index is not one.
Robert Rosenberg (1970)
Studia Mathematica
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Denny Leung (1993)
Studia Mathematica
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It is shown that the weak spaces , and are isomorphic as Banach spaces.
A. Calderón (1964)
Studia Mathematica
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