We introduce ( m, n) - injective modules, ( m, n) - fiat modules and right ( m, n ) - coherent rings via n - presented dimensions, and give several characterizations of right( m, n) - coheren trings.%利用n-表现维数引进了(m,n)-内射模,(m,n)-平坦模及右(m,n)-凝聚环的概念,并给出了右(m,n)-凝聚环的若干刻画。
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