X-lifting modules over right perfect rings

CH Chang - Bulletin of the Korean Mathematical Society, 2008 - koreascience.kr
Keskin and Harmanci defined the family B (M, X)= ${A {\leq} M|{\exists} Y {\leq} X,{\exists} f
{\in} Hom_R (M, X/Y),\; Ker\; f/A {\ll} M/A} $. And Orhan and Keskin generalized projective …

X-LIFTING MODULES OVER RIGHT PERFECT RINGS

장재훈 - 대한수학회보, 2008 - dbpia.co.kr
Keskin and Harmanci defined the family B (M, X)={A≤ M|∃ Y≤ X,∃ f∈ HomR (M, X/Y), Ker
f/A≪ M= A}. And Orhan and Keskin generalized projective modules via the class B (M, X). In …