COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES, cilt.76, sa.12, ss.1801-1810, 2023 (SCI-Expanded)
Let R be a commutative ring with 1 ̸= 0. A proper ideal I of R is said to
be a quasi maximal ideal if for every a ∈ R − I, either I + Ra = R or I + Ra
is a maximal ideal of R. This class of ideals lies between 2-absorbing ideals
and maximal ideals which is different from prime ideals. In addition to give
fundamental properties of quasi maximal ideals, we characterize principal ideal
UN-rings with √
0
2
= (0), direct product of two fields, and Noetherian zero
dimensional modules in terms of quasi maximal ideals.