Pseudo-integral of differential equations of the n-th order
K. Orlov, M. Stojanović (1974)
Matematički Vesnik
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K. Orlov, M. Stojanović (1974)
Matematički Vesnik
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H. B. Potoczny (1984)
Matematički Vesnik
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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.
Young Bae Jun, Hee Sik Kim, J. Neggers (2006)
Matematički Vesnik
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Mauricio E. Chacón-Tirado, Alejandro Illanes, Rocío Leonel (2012)
Colloquium Mathematicae
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An embedding from a Cartesian product of two spaces into the Cartesian product of two spaces is said to be factorwise rigid provided that it is the product of embeddings on the individual factors composed with a permutation of the coordinates. We prove that each embedding of a product of two pseudo-arcs into itself is factorwise rigid. As a consequence, if X and Y are metric continua with the property that each of their nondegenerate proper subcontinua is homeomorphic to the pseudo-arc,...
Zenon Moszner, Maria Żurek-Etgens (1987)
Archivum Mathematicum
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Grzegorz Dymek (2015)
Discussiones Mathematicae - General Algebra and Applications
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The notions of a period of an element of a pseudo-BCI-algebra and a periodic pseudo-BCI-algebra are defined. Some of their properties and characterizations are given.