deffunc H₁( Subset of ) -> Element of ExtREAL = inf (Svc $1);
thus for F1, F2 being Function of bool REAL , ExtREAL st ( for A being Subset of holds F1 . A = H₁(A) ) & ( for A being Subset of holds F2 . A = H₁(A) ) holds
F1 = F2 from BINOP_2:sch 1(); :: thesis: verum