[PDF][PDF] Lifting modules with respect to images of a fully invariant submodule

T Amouzegar, ARM Hamzekolaee - Novi Sad J. Math, 2020 - researchgate.net
Novi Sad J. Math, 2020researchgate.net
Lifting modules as a main concept in module theory have been studied and investigated
extensively in recent decades. The first author in [1] tried to consider and investigate this
concept with a homological approach. Let R be a ring and M be a right R-module. Then M is
called I-lifting if image of every endomorphism of M lies above a direct summand of M. In this
paper, we are interested in studying modules M with the property that ϕ (F)/D≪ M/D for
every endomorphism ϕ of M and for some direct summands D of M, where F is a fixed fully …
Abstract
Lifting modules as a main concept in module theory have been studied and investigated extensively in recent decades. The first author in [1] tried to consider and investigate this concept with a homological approach. Let R be a ring and M be a right R-module. Then M is called I-lifting if image of every endomorphism of M lies above a direct summand of M. In this paper, we are interested in studying modules M with the property that ϕ (F)/D≪ M/D for every endomorphism ϕ of M and for some direct summands D of M, where F is a fixed fully invariant submodule of M. We call such modules IF-lifting. We provide some examples of IF-lifting modules as a proper generalization of lifting modules. Some characterizations of IF-lifting modules are given. We also define relative IF-lifting modules to study direct summands and finite direct sums of IF-lifting modules.
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