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:
“I wouldn’t pray just for a old man that’s dead because he’s all right. If I was to pray, I’d pray for the folks that’s alive and don’t know which way to turn. Grampa here, he ain’t got no more trouble like that. He’s got his job all cut out for him. So cover him up and let him get to it.”
—Nunnally Johnson (1897–1977)