The family is the natural and fundamentalgroup unit of society and is entitled to protection by society and the State.
家庭是天然的和基本的社会单元,并应受社会和国家的保护。
2
In this paper, we study the condition which makes the fundamentalgroup of graph have every positive integer as the index of some normal subgroup.
本文主要研究图的基本群的正规子群的指数何时成为任意正整数的条件。
3
In this paper, the authors give the globally classfication of the maximal totally geodesic submanifolds with maximal rank of normal Riemannian symmetric Spaces by computing the fundamentalgroup.