The result was delete. Cirt ( talk) 10:14, 15 January 2010 (UTC) reply
Self-explanatory notion. Even though it's used in many books, I couldn't find any engaging in the pedantry of defining it, so a separate article seems unwarranted as a trivial mathematical WP:DICTDEF. Agreed to delete in this discussion at WT:WPM but deprodded by an uninvolved admin. So here we go by the book. Pcap ping 20:19, 6 January 2010 (UTC) reply