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单词 LadderConnected
释义

ladder connected


DefinitionSuppose X is a topological spaceMathworldPlanetmath. ThenX is called ladder connected provided that anyopen cover 𝒰 of X has the following property:If p,qX, then there exists a finite number ofopen sets U1,,UN from 𝒰 such thatpU1, U1U2, , UN-1UN,and qUN.

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更新时间:2025/5/4 4:56:10