英和和英

発音

• IPA: /ˈkʌvəɹɪŋ/

語源 1

Present participle or participial adjective from cover (verb) +‎ -ing; or, from 中期英語 coverynge, participle form of coveren, keveren (“to cover”).

動詞

covering

1. present participle and gerund of cover

語源 2

From 中期英語 coverynge, -inge, keverynge, -inge [verbal noun of coveren, keveren (“to cover”)]; or, verbal noun from cover (verb) +‎ -ing.

名詞

covering (countable and uncountable, plural coverings)

1. (countable) That which covers or conceals; a cover; something spread or laid over or wrapped about another.
   • 2020 May 20, Richard Clinnick, “Network News: More trains... but advice is not to use public transport”, in Rail, page 6:

     Face covering is also mentioned: "There are some circumstances when wearing a face covering may be marginally beneficial as a precautionary measure. The evidence suggests that wearing a face covering does not protect you, but it may protect others if you are infected but have not yet developed symptoms. [...] If you can, wear a face covering if you need to use public transport."

2. (uncountable) Action of the verb to cover.
3. (topology, of a given open set ${\\displaystyle U}$) A collection of sets ${\\displaystyle \\{U_{i}\\}}$ such that their union contains ${\\displaystyle U}$; such a collection with the additional property that every ${\\displaystyle U_{i}}$ is open; such a collection with the additional property that every ${\\displaystyle U_{i}}$ is contained in ${\\displaystyle U}$.
4. (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 ${\\displaystyle \\pi :E\\rightarrow X}$ between topological spaces such that there exists, for every point ${\\displaystyle x}$ in ${\\displaystyle X}$, a discrete space ${\\displaystyle D_{x}}$ and an open neighborhood ${\\displaystyle U}$ of ${\\displaystyle x}$ such that ${\\displaystyle \\pi ^{-1}(U)=\\displaystyle \\bigsqcup _{d\\in D_{x}}V_{d}}$ and ${\\displaystyle \\pi |_{V_{d}}:V_{d}\\rightarrow U}$ is a homeomorphism for every ${\\displaystyle d\\in D_{x}}$. See Covering space on Wikipedia.Wikipedia

使用する際の注意点

In sense etymology 2 sense 4, properly, the map ${\\displaystyle \\pi }$ is the covering, and ${\\displaystyle E}$ is called the covering space, but by abuse of terminology, "covering" may refer to ${\\displaystyle E}$, "covering space" may refer to ${\\displaystyle \\pi }$, and either may refer to the tuple ${\\displaystyle (E,\\pi )}$.

派生語

参照