Complete rings of functions and Wallman-Frink compactifications
Eliza Wajch (1988)
Colloquium Mathematicae
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Eliza Wajch (1988)
Colloquium Mathematicae
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Chen, Weixing (2006)
International Journal of Mathematics and Mathematical Sciences
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Guo, Xiaojiang, Shum, K.P. (2006)
International Journal of Mathematics and Mathematical Sciences
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Manfred Dugas, Shalom Feigelstock (2004)
Rendiconti del Seminario Matematico della Università di Padova
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Samman, Mohammad (2003)
Mathematica Pannonica
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Manfred Dugas, Shalom Feigelstock (2003)
Colloquium Mathematicae
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A ring R is called an E-ring if every endomorphism of R⁺, the additive group of R, is multiplication on the left by an element of R. This is a well known notion in the theory of abelian groups. We want to change the "E" as in endomorphisms to an "A" as in automorphisms: We define a ring to be an A-ring if every automorphism of R⁺ is multiplication on the left by some element of R. We show that many torsion-free finite rank (tffr) A-rings are actually E-rings. While we have an example...
Nasr-Isfahani, A.R., Moussavi, A. (2007)
International Journal of Mathematics and Mathematical Sciences
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H. Al-Ezeh (1990)
Matematički Vesnik
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O. A. S. Karamzadeh, M. Motamedi, S. M. Shahrtash (2004)
Fundamenta Mathematicae
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Right ue-rings (rings with the property of the title, i.e., with the maximality of the right socle) are investigated. It is shown that a semiprime ring R is a right ue-ring if and only if R is a regular V-ring with the socle being a maximal right ideal, and if and only if the intrinsic topology of R is non-discrete Hausdorff and dense proper right ideals are semisimple. It is proved that if R is a right self-injective right ue-ring (local right ue-ring), then R is never semiprime and...
Huanyin Chen, Miaosen Chen (2005)
Czechoslovak Mathematical Journal
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It is shown that a ring is a -ring if and only if there exists a complete orthogonal set of idempotents such that all are -rings. We also investigate -rings for Morita contexts, module extensions and power series rings.
Cortes, Wagner (2008)
International Journal of Mathematics and Mathematical Sciences
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Carl Faith (1990)
Publicacions Matemàtiques
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In the article appeared in this same journal, vol. 33, 1 (1989) pp. 85-97, some statements in the proof of Example 3.4B got scrambled.
Outcalt, David L. (1967)
Portugaliae mathematica
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