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GOLDIE*-SUPPLEMENTED MODULES

Published online by Cambridge University Press:  24 June 2010

G. F. BIRKENMEIER
Affiliation:
Department of Mathematics, University of Louisiana at Lafayette, Lafayette, LA 70504 1010, USA e-mail: gfb1127@louisiana.edu
F. TAKIL MUTLU
Affiliation:
Department of Mathematics, Anadolu University, 26470 Eskisehir, Turkey e-mail: figent@anadolu.edu.tr
C. NEBİYEV
Affiliation:
Department of Mathematics, OnDokuz Mayıs University, 55139 Samsun, Turkey e-mail: cnebiyev@omu.edu.tr
N. SOKMEZ
Affiliation:
Department of Mathematics, OnDokuz Mayıs University, 55139 Samsun, Turkey e-mail: nozkan@omu.edu.tr
A. TERCAN
Affiliation:
Department of Mathematics, Hacettepe University, Beytepe Campus, 06532 Ankara, Turkey e-mail: tercan@hacettepe.edu.tr.
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Abstract

Motivated by a relation on submodules of a module used by both A. W. Goldie and P. F. Smith, we say submodules X, Y of M are β* equivalent, Xβ*Y, if and only if is small in and is small in . We show that the β* relation is an equivalence relation and has good behaviour with respect to addition of submodules, homomorphisms and supplements. We apply these results to introduce the class of -supplemented modules and to investigate this class and the class of H-supplemented modules. These classes are located among various well-known classes of modules related to the class of lifting modules. Moreover these classes are used to explore an open question of S. H. Mohamed and B. J. Mueller. Examples are provided to illustrate and delimit the theory.

Type
Research Article
Copyright
Copyright © Glasgow Mathematical Journal Trust 2010

References

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