reserve i,j,k,l,m,n for Nat,
  D for non empty set,
  f for FinSequence of D;
reserve X for compact Subset of TOP-REAL 2;
reserve r for Real;
reserve f for non trivial FinSequence of TOP-REAL 2;
reserve f for non constant standard special_circular_sequence;

theorem
  E-min L~f <> E-max L~f
proof
  (E-min L~f)`2 < (E-max L~f)`2 by Th53;
  hence thesis;
end;
