theorem
  for b being Element of X for g being Euclidean ExecutionFunction of A,
Funcs(X,INT), Funcs(X,INT)\(b,0) for x being Variable of g for i being Integer
 holds (s.x <= i iff g.(s, x leq i) in Funcs(X,INT)\(b,0)) & (s.x >= i
  iff g.(s, x geq i) in Funcs(X,INT)\(b,0))
proof
  let b be Element of X;
  let g be Euclidean ExecutionFunction of A,Funcs(X,INT), Funcs(X,INT)\(b,0);
  let x be Variable of g;
  let i be Integer;
  g.(s, x leq i) in Funcs(X,INT)\(b,0) iff g.(s, x leq i).b <> 0 by Th2;
  hence s.x <= i iff g.(s, x leq i) in Funcs(X,INT)\(b,0) by Th34;
  g.(s, x geq i) in Funcs(X,INT)\(b,0) iff g.(s, x geq i).b <> 0 by Th2;
  hence thesis by Th34;
end;
