Pseudo-valuation and pseudo norm
Surjit Singh (1974)
Rendiconti del Seminario Matematico della Università di Padova
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Surjit Singh (1974)
Rendiconti del Seminario Matematico della Università di Padova
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Doh, Myung Im, Kang, Min Su (2011)
International Journal of Mathematics and Mathematical Sciences
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Jaber, Ameer (2008)
International Journal of Mathematics and Mathematical Sciences
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Ayache, Ahmed, Dobbs, David E., Echi, Othman (2006)
International Journal of Mathematics and Mathematical Sciences
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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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C. J. Himmelberg (1968)
Fundamenta Mathematicae
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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.