JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2020, Vol. 55 ›› Issue (8): 54-58.doi: 10.6040/j.issn.1671-9352.0.2019.692

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Some characterizations of a class of special morphisms of modules

LAN Kai-yang*, YANG Ting-ting   

  1. College of Mathematics and Computer Science, Northwest Minzu University, Lanzhou 730030, Gansu, China
  • Published:2020-07-14

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Abstract: Let n be a positive integer. First, some equivalent characterizations of Torn-monomorphism and Extn-epimorphism are studied. Secondly, some sufficient conditions for a morphism to be a Torn-epimorphism or an Extn-monomorphism are given.

Key words: Extn-epimorphism, Torn-monomorphism, FP-injective dimension

CLC Number: 

  • O154.2
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