حول المقاسات الجزئية الابتدائية من النمط

Let M be an R-module .In this paper we introduce the concept of n - primary submodule, where n is a fixed positive integer , and a submodule N of M is called n- primary , if whenever r E R , x E M , rx EN implies xEN or rE(N:M) . We study this concept and give some of its properties