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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
Let n be a positive integer. In this article a new kind ofinjectivity, namely n-principally weakly injective act is defined, this property is a genaralization of principally weakly injectivity. A monoid S is called n-regular, if for every s∈S, s n is regular. Using this new property the characterizations of category of n-regular monoids are investigated and some known results are extended.