On M-Principally Injective and Projective S-acts

Javed Hussain, Muhammad Shabir


In this paper, we have introduced the notions of M-cyclic S-acts,
M-principally projective and injective S-acts, semi-projective S-acts and co-
cyclic S-acts, whereMis a right S-act. Several interesting properties, charac-
terizations relations between newly dened structures have been investigated.


Principally projective and injective S-ats, quasi-principally injective and prokective S-acts

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