Pseudo-metrizability of quotient spaces
C. J. Himmelberg (1968)
Fundamenta Mathematicae
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C. J. Himmelberg (1968)
Fundamenta Mathematicae
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H. B. Potoczny (1984)
Matematički Vesnik
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K. Orlov, M. Stojanović (1974)
Matematički Vesnik
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Surjit Singh (1974)
Rendiconti del Seminario Matematico della Università di Padova
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Jin Yuan Zhou (1993)
Commentationes Mathematicae Universitatis Carolinae
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It is proved that, under the Martin’s Axiom, every -space with countable tightness is a subspace of some pseudo-radial space. We also give several characterizations of subspaces of pseudo-radial spaces and conclude that being a subspace of a pseudo-radial space is a local property.
J. L. Cornette (1968)
Colloquium Mathematicae
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Zenon Moszner, Maria Żurek-Etgens (1987)
Archivum Mathematicum
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Akbar Rezaei, Arsham Borumand Saeid, Andrzej Walendziak (2017)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
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The notions of a dual pseudo-Q algebra and a dual pseudo-QC algebra are introduced. The properties and characterizations of them are investigated. Conditions for a dual pseudo-Q algebra to be a dual pseudo-QC algebra are given. Commutative dual pseudo-QC algebras are considered. The interrelationships between dual pseudo-Q/QC algebras and other pseudo algebras are visualized in a diagram.