Demirci, Yilmaz MehmetTurkmen, Ergul2022-10-102022-10-1020222227-7390WOS:000845532800001https://doi.org/10.3390/math10162964https://hdl.handle.net/20.500.12573/1382In this paper, we introduce the concept of wsa-supplements and investigate the objects of the class of short exact sequences determined by wsa-supplement submodules, where a submodule U of a module M is called a wsa-supplement in M if there is a submodule V of M with U + V = M and U ∩ V is weakly semiartinian. We prove that a module M is weakly semiartinian if and only if every submodule of M is a wsa-supplement in M. We introduce CC-rings as a generalization of C-rings and show that a ring is a right CC-ring if and only if every singular right module has a crumbling submodule. The class of all short exact sequences determined by wsa-supplement submodules is shown to be a proper class which is both injectively and co-injectively generated. We investigate the homological objects of this proper class along with its relation to CC-rings.enginfo:eu-repo/semantics/openAccessproper class of short exact sequenceswsa-supplement submoduleweakly semiartinian moduleC-ringCC-ringarticle1016112