disjoint

By the method of "Every open set in R″ is the union of an at most countable collection of disjoint connected open sets",the paper deals with some problems of countability in real analysis.

以“平面上互不相交的若干开集所成之族至多可数”为基点,对一些相关结果给出了全新的直观化证明。

On the issue of nationalities Sima Qian s idea may be summed up as three principles of coexistence of nationalities,namely,equality of nationalities without differentiating the superior from the inferior,mutual respect and reciprocity of courtesy,and peaceful coexistence with mutual nonaggression.

在民族问题上,司马迁的“一家之言”可归结为民族相处的三条原则:民族平等,无优无劣;互相尊重,礼尚往来;和平共处,互不侵扰。

This paper analyzes the event s independences and incompatibility, and discusses some relations among independence, incompatibility and null events.

对事件的独立性、互不相容性进行了剖析,并讨论了独立性、互不相容性与零概率事件的关系。