Some properties of -dimensional generalized cubes
Władysław Kulpa (1995)
Acta Universitatis Carolinae. Mathematica et Physica
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Władysław Kulpa (1995)
Acta Universitatis Carolinae. Mathematica et Physica
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Joós, Antal (2008)
Beiträge zur Algebra und Geometrie
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Katsuya Eda, Vlasta Matijević (2013)
Fundamenta Mathematicae
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Let Y be a connected group and let f: X → Y be a covering map with the total space X being connected. We consider the following question: Is it possible to define a topological group structure on X in such a way that f becomes a homomorphism of topological groups. This holds in some particular cases: if Y is a pathwise connected and locally pathwise connected group or if f is a finite-sheeted covering map over a compact connected group Y. However, using shape-theoretic techniques and...
Joos, A. (2009)
Beiträge zur Algebra und Geometrie
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Saharon Shelah (2000)
Fundamenta Mathematicae
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Let W be an inner model of ZFC. Let κ be a cardinal in V. We say that κ-covering holds between V and W iff for all X ∈ V with X ⊆ ON and V ⊨ |X| < κ, there exists Y ∈ W such that X ⊆ Y ⊆ ON and V ⊨ |Y| < κ. Strong κ-covering holds between V and W iff for every structure M ∈ V for some countable first-order language whose underlying set is some ordinal λ, and every X ∈ V with X ⊆ λ and V ⊨ |X| < κ, there is Y ∈ W such that X ⊆ Y ≺ M and V ⊨ |Y| < κ. We prove that if κ is...
Karol Borsuk, Rimas Vaina (1979)
Colloquium Mathematicae
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Arens, Richard, Dugundji, J. (1950)
Portugaliae mathematica
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Frank Wattenberg (1978)
Fundamenta Mathematicae
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A. Fine (1963)
Fundamenta Mathematicae
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