Covering

Meaning

Verb

●

present participle

and

of cover

Noun

●

That which

or

; a

; something

or

or

about another.

●

Action of the

to cover.

●

In Topology:

A

onto a

topological space

X, π:E→X,

a

D and for every

∈X an

U⊂X,

π⁻¹(U)=

isplaystyle ⨆_(d∈D)V_d and π|_(V_d):V_d→U is a

for every

∈D.

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