… Cofinitely δ-supplemented and cofinitely δ-semiperfect modules, International Journal of
Algebra, 12, 2007, 601-613. [3] Dung, NV, Huynh, DV, Smith, PF and Wisbauer, R.: …

… B is called generalized ⊕- cofinitely δ -supplemented module provided that each cofinite
submodule of … In place of writing generalized ⊕- cofinitely δ -supplemented module, we choose …

… Then every 𝑅-module is cofinitely weak 𝛿-supplemented if and only if every 𝑅-module has
the property 𝛿-(𝐶𝑊𝐸)… 𝑅 is a 𝛿-semilocal ring that is not 𝛿-semiperfect. Then there exists an 𝑅-…

… modules whose maximal submodules have τ-supplements. We see that these modules coincide
with the modules whose cofinite … R-module M generalized (cofinitely) δ-supplemented if …

… Using these modules, we show that a ring R is δ−semiperfect if and only if every left R−…
call a module M is cofinitely weak δ− supplemented (or briefly δ−CWS-module) if every cofinite …

… and M is called δ-supplemented in case every submodule … module has the property (δ-E).
Moreover we obtain that if every left R-module has the property (δ-E), then R is a δ-semiperfect …

… modules have the property (𝛿 − 𝑆𝐸) is 𝛿-semiperfect. Let 𝑅 be a ring, 𝑀 be an 𝑅-module with
… A module 𝑀 is called 𝛿 -supplemented if every submodule of 𝑀 has a 𝛿-supplement in 𝑀 . …

… From [24, Example 4.4], it can be seen that RR is a δ-semiperfect ring which is not δss-perfect.
Hence the R-module R is a ⊕-δ-supplemented module which is not ⊕-δss-supplemented …

… In the next proposition we provide a condition under which a ⊕-δ-supplemented module
is I-⊕-supplemented. To prove this result, we need the following elementary lemma. …

… He introduced δ-lifting modules and δ-supplemented modules and tried to … on δ-supplemented
modules and their natural derivations ([1] and [2]). They generally focused on modules …