APA (7th ed.) Citation
(1991). Compact unions of closed subsets are closed and compact intersections of open subsets are open. [s.n.].
Chicago Style (17th ed.) Citation
Compact Unions of Closed Subsets Are Closed and Compact Intersections of Open Subsets Are Open. [s.l.]: [s.n.], 1991.
MLA (9th ed.) Citation
Compact Unions of Closed Subsets Are Closed and Compact Intersections of Open Subsets Are Open. [s.n.], 1991.
Warning: These citations may not always be 100% accurate.