Direct Projective Modules with the Summand Sum Property
Commun. Korean Math. Soc. 1997 Vol. 12, No. 4, 865-868
Chang Woo Han, Su Jeong Choi Dong-A University, Dong-A University
Abstract : Let $R$ be a ring with a unity and let $M$ be a unitary left $R$-module. In this paper, we establish [5, Proposition 2.8] by showing the proof of it. Moreover, from the above result, we obtain some properties of direct projective modules which have the summand sum property.
Keywords : direct projective module, summand sum property, summand intersection property