covering

a thing that covers, protects, or hides something else

1. 1.

   That which covers or conceals; a cover; something spread or laid over or wrapped about another.

   遮盖或隐藏之物；覆盖物；铺在或包在另一物上的东西。

2. 2.

   a natural object that covers or envelops

   覆盖或包裹的天然物体

3. 3.

   Action of the verb to cover.

   动词“覆盖”所指的动作。

4. 4.

   an artifact that covers something else (usually to protect or shelter or conceal it)

   覆盖某物的人造物(通常用于保护、遮蔽或隐藏)

5. 5.

   A collection of sets U_i such that their union contains U; such a collection with the additional property that every U_i is open; such a collection with the additional property that every U_i is contained in U.

   一组集合U_i,其并集包含U；也指每个U_i均为开集的集合；或每个U_i均包含于U的集合。

6. 6.

   the act of concealing the existence of something by obstructing the view of it

   通过遮挡视线来隐藏某物存在的行为

7. 7.

   A special kind of map that establishes a relationship between two topological spaces in the sense that, under the action of the map, the one looks locally like several copies of the second: Formally, a continuous map π:E→X between topological spaces such that there exists, for every point x in X, a discrete space D_x and an open neighborhood U of x such that π−1(U)= displaystyle ⨆_(d∈D_x)V_d and π|_(V_d):V_d→U is a homeomorphism for every d∈D_x. See Covering space on Wikipedia.Wikipedia

   建立两个拓扑空间之间关系的特殊映射,使得一个空间在局部上像是另一个空间的若干副本。形式上,是连续映射π:E→X,对X中每一点x,存在离散空间D_x和开邻域U,使得π−1(U)=⊔_{d∈D_x}V_d,且π|_{V_d}:V_d→U是同胚。

覆盖；遮盖；掩盖；掩饰；覆盖；覆叠映射；覆盖映射；遮盖或隐藏之物；覆盖物；铺在或包在另一物上的东西。

In use

Connections

Learner notes