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单词 UniformContinuityOfLipschitzFunctions
释义

uniform continuity of Lipschitz functions


Proposition 1.

An Hölder continuous mapping is uniformly continuousPlanetmathPlanetmath.In particular any Lipschitz continuous mapping is uniformly continuous.

Proof.

Let f:XY be a mapping such that for some C>0 and α with 0<α1 onehas

dY(f(p),f(q))CdX(p,q)α.

For every given ϵ>0, chooseδ=(ϵ/(C+1))1α.If p,qX are given points satisfying

dX(p,q)<δ

then

dY(f(p),f(q))CδαCϵC+1<ϵ,

as desired.∎

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