On Purely –Extending Modules
Keywords:
Pure submodule ; , y – closed submodule , Extending modulesAbstract
In this note we consider a generalization of the notion of a purely extending
modules, defined using y– closed submodules.
We show that a ring R is purely y – extending if and only if every cyclic nonsingular
R – module is flat. In particular every nonsingular purely y extending ring is
principal flat.