• Journal of the Chungcheong Mathematical Society
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• v.21 no.4
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• pp.591-599
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• 2008

The purpose of this paper is to find some equivalent condition of weakly nonsingular congruence on S-system $M_S$ and this study, we consider p-injective S-system and large subsystem.

• Journal of the Chungcheong Mathematical Society
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• v.20 no.4
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• pp.485-493
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• 2007

The purpose of this paper is to introduce and investigate the weakly large subsystem of S-system $M_S$. In this study, we consider injective algebraic system and large subsystem. We also characterize weakly nonsingular congruence on S-system.