Compact Boolean algebras
Wiesław Głowczyński (2005)
Acta Universitatis Carolinae. Mathematica et Physica
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Wiesław Głowczyński (2005)
Acta Universitatis Carolinae. Mathematica et Physica
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A. Kamburelis, M. Kutyłowski (1986)
Colloquium Mathematicae
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Pavel Pták (1990)
Commentationes Mathematicae Universitatis Carolinae
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D. H. Fremlin, B. de Pagter, W. J. Ricker (2005)
Studia Mathematica
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Complete and σ-complete Boolean algebras of projections acting in a Banach space were introduced by W. Bade in the 1950's. A basic fact is that every complete Boolean algebra of projections is necessarily a closed set for the strong operator topology. Here we address the analogous question for σ-complete Boolean algebras: are they always a sequentially closed set for the strong operator topology? For the atomic case the answer is shown to be affirmative. For the general case, we develop...
Roman Sikorski (1951)
Colloquium Mathematicum
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Robert Lagrange (1974)
Colloquium Mathematicae
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Brian Wynne (2008)
Fundamenta Mathematicae
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Two Boolean algebras are elementarily equivalent if and only if they satisfy the same first-order statements in the language of Boolean algebras. We prove that every Boolean algebra is elementarily equivalent to the algebra of clopen subsets of a normal P-space.