concept of maximal non-pseudo-valuation domain. The equivalence of maximal non-ϕ-PVR
and maximal non-local ring is established under some conditions. The concept of maximal
non-PVR is also introduced and it is shown that a maximal non-PVR is either a ϕ-PVR or a
maximal non-ϕ-PVR. Examples are also given to show that all the introduced concepts are
independent of each other, in general.