let n be Nat; :: thesis: for seq being Real_Sequence st seq is non-increasing holds
(superior_realsequence seq) . n = seq . n
let seq be Real_Sequence; :: thesis: ( seq is non-increasing implies (superior_realsequence seq) . n = seq . n )
reconsider Y1 = { (seq . k) where k is Nat : n <= k } as Subset of REAL by Th29;
assume A1: seq is non-increasing ; :: thesis: (superior_realsequence seq) . n = seq . n
(superior_realsequence seq) . n = upper_bound Y1 by Def5;
hence (superior_realsequence seq) . n = seq . n by A1, Th35; :: thesis: verum