Compactification (mathematics)
Embedding a topological space into a compact space as a dense subset / From Wikipedia, the free encyclopedia
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In mathematics, in general topology, compactification is the process or result of making a topological space into a compact space.[1] A compact space is a space in which every open cover of the space contains a finite subcover. The methods of compactification are various, but each is a way of controlling points from "going off to infinity" by in some way adding "points at infinity" or preventing such an "escape".