covering

verb · nounB1

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Động từ

verb

1.
(form of, gerund, participle, present)present participle and gerund of cover

Danh từ

noun

Plural noun:

coverings

1.
(countable)That which covers or conceals; a cover; something spread or laid over or wrapped about another.
2.
(uncountable)Action of the verb to cover.
3.
(countable, uncountable)(topology, of a given open set U) 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.
4.
(countable, uncountable)(topology) 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

Từ liên quan

Đồng nghĩa

impregnate

Cùng gốc / liên quan

bedcoveringfloorcoveringprecoveringsemicoveringsubcoveringundercoveringwallcoveringface coveringcovering indexhead coveringwall coveringwindow coveringcovering horse

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Nguồn gốc từ

Present participle or participial adjective from cover + -ing; or, from Middle English coverynge, participle form of coveren, keveren (to cover).