Modules in which semisimple fully invariant submodules are essential in summands

Modules in which semisimple fully invariant submodules are essential in summands

One of the useful generalization of extending notion is FI -extending property. A module is called FI -extending if every fully invariant submodule is essential in a direct summand. In this paper, we explore Weak FI -extending concept by considering only semisimple fully invariant submodules rather than all fully invariant submodules.To this end, we call such a module Weak FI -extending. We obtain that FI -extending modules are properly containedin this new class of modules. Amongst other structural properties, we also deal with direct sums and direct summandsof Weak FI -extending modules.

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