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ON TOR-TORSION THEORIES
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 Title & Authors
ON TOR-TORSION THEORIES
GOLRIZ M.; BIJANZADEH M. H.;
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 Abstract
Tor-torsion theory was defined by Jan Trlifaj in 2000. In this paper we introduce the notion of Co envelopes, CoCovers and Tor-generators as dual of envelopes, covers and generators in cotorsion(Ext-torsion) theory and deduce that each R-module has a projective and a cotorsion coprecover.
 Keywords
tor-torsion theory;co(pre)cover;co(pre)envelope;tor-generator;
 Language
English
 Cited by
 References
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J. Trlifaj, Covers, envelopes, and Cotorsion theoreis, Lecture Notes for theWorkshop, 'Homological methods in modules theory', Cortona, 2000

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