Line minimal Boolean forests
Frank Harary, Abbe Mowshowitz, Allen Schwenk (1977)
Colloquium Mathematicae
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Frank Harary, Abbe Mowshowitz, Allen Schwenk (1977)
Colloquium Mathematicae
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Aleksander Błaszczyk, Andrzej Kucharski, Sławomir Turek (2014)
Open Mathematics
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The aim of this paper is to show that every infinite Boolean algebra which admits a countable minimally acting group contains a dense projective subalgebra.
Roman Sikorski (1950)
Fundamenta Mathematicae
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Stefan Geschke (2004)
Acta Universitatis Carolinae. Mathematica et Physica
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Vincent Astier (2013)
Fundamenta Mathematicae
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We prove that the boolean algebras of sets definable in elementarily equivalent o-minimal expansions of real closed fields are back-and-forth equivalent, and in particular elementarily equivalent, in the language of boolean algebras with new predicates indicating the dimension, Euler characteristic and open sets. We also show that the boolean algebra of semilinear subsets of [0,1]ⁿ definable in an o-minimal expansion of a real closed field is back-and-forth equivalent to the boolean...
Roman Sikorski (1964)
Fundamenta Mathematicae
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Bohuslav Balcar, Petr Štěpánek (1977)
Fundamenta Mathematicae
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Roman Sikorski (1961)
Colloquium Mathematicum
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