covering n. 被覆,外被;外封;房頂;上覆物,掩護;【商業(yè)】了結(jié),補進。 covering fire 掩護射擊。 covering for ( chair, hand ...) (椅、手…)套。 covering letter (寄送物件等作為說明的)附信。 covering note 【火災(zāi)保險】承保通知單。 covering party 【軍事】掩護隊。 covering price (一切計算在內(nèi)的)總價。
The chapter 2 of thid paper mainly include two - aspect contents : semi - stratifiable spaces and point - countable covers 本文第二章主要包含兩方面的內(nèi)容:半層空間和點可數(shù)覆蓋。
In the research of the theory of generalized metric spaces , the method of mapping and covering is a very important tool , especially the point - countable covers play a more important role . for example , the concept of paracompactness was introduced by way of using a class of special point - countable cover by the famous french mathematician dieudonne in 1944 在廣義度量空間理論研究中,映射和覆蓋的方法是一種非常重要的工具,特別是點可數(shù)覆蓋起著舉足輕重的作用,例如, 1944年法國數(shù)學(xué)大師dieudonn引進的仿緊性概念使用的就是一類特殊的點可數(shù)覆蓋。