摘要
φ是群 G 到 K 的满同态映射.利用(?)将群 K 中的同余关系ρ诱导到群 G 中,在此基础上获得同态映射φ与同余关系的上(下)近似可交换的性质,证明同态映射φ保持上(下)粗子群、上(下)粗左(右.双侧)理想不变.
Let φ be a surjective homomorphic mapping from group G to group K. Through the congruence relation ρ from K to G by φ , the property, that the surjective homomorphic mapping φ can commutate with the upper (lower) approximation of the congruence relation, is obtained. It is shown that a homomorphic mapping keeps upper (lower) rough subgroups, and upper (lower) rough left (right, two-sided) ideally unchanged.
出处
《模式识别与人工智能》
EI
CSCD
北大核心
2006年第3期338-341,共4页
Pattern Recognition and Artificial Intelligence
关键词
粗糙群
粗糙理想
同余
满同态
Rough Group, Rough Ideal, Congruence, Surjective Homomorphism