Compactification (mathematics)
In mathematics, compactification is the process or result of making a topological space compact. 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".
Read more about Compactification (mathematics): An Example, Definition, Projective Space, Compactification and Discrete Subgroups of Lie Groups, Other Compactification Theories