let C, D be non empty finite set ; for F being PartFunc of D,REAL
for A being RearrangmentGen of C st F is total & card C = card D holds
FinS ((Rland (F,A)),C) = FinS (F,D)
let F be PartFunc of D,REAL; for A being RearrangmentGen of C st F is total & card C = card D holds
FinS ((Rland (F,A)),C) = FinS (F,D)
let B be RearrangmentGen of C; ( F is total & card C = card D implies FinS ((Rland (F,B)),C) = FinS (F,D) )
assume A1:
( F is total & card C = card D )
; FinS ((Rland (F,B)),C) = FinS (F,D)
then A2:
Rland (F,B), FinS (F,D) are_fiberwise_equipotent
by Th16;
A3:
dom (Rland (F,B)) = C
by A1, Th12;
then
(Rland (F,B)) | C = Rland (F,B)
by RELAT_1:68;
hence
FinS ((Rland (F,B)),C) = FinS (F,D)
by A2, A3, RFUNCT_3:def 13; verum