Cover (topology)
In mathematics, a cover of a set X is a collection of sets whose union contains X as a subset. Formally, if
is an indexed family of sets Uα, then C is a cover of X if
Read more about Cover (topology): Cover in Topology, Refinement, Compactness, Covering Dimension
Famous quotes containing the word cover:
“Every man alone is sincere. At the entrance of a second person, hypocrisy begins. We parry and fend the approach of our fellow-man by compliments, by gossip, by amusements, by affairs. We cover up our thought from him under a hundred folds.”
—Ralph Waldo Emerson (1803–1882)