let S be non empty set ; for R being total Relation of ,
for BASSIGN being non empty Subset of
for f, g being Assign of (CTLModel R,BASSIGN) st Fid f,S = Fid g,S holds
f = g
let R be total Relation of ,; for BASSIGN being non empty Subset of
for f, g being Assign of (CTLModel R,BASSIGN) st Fid f,S = Fid g,S holds
f = g
let BASSIGN be non empty Subset of ; for f, g being Assign of (CTLModel R,BASSIGN) st Fid f,S = Fid g,S holds
f = g
let f, g be Assign of (CTLModel R,BASSIGN); ( Fid f,S = Fid g,S implies f = g )
Fid f,S = f
by Def41;
hence
( Fid f,S = Fid g,S implies f = g )
by Def41; verum