Abstract
A pre-natural class of modules over a ring R is one that is closed under isomorphic copies, submodules, arbitrary direct sums, and certain essential extensions. The set Npr(R) of all pre-natural classes is a lattice, which contains many previously studied lattices of R-module classes. The sublattice structure of Npr(R) is studied in this paper and is related to ring and module properties of R
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have