reserve n for Nat;

theorem Th19:
  for C be compact non vertical non horizontal Subset of TOP-REAL
  2 holds (W-min L~Cage(C,n))..Upper_Seq(C,n) = 1
proof
  let C be compact non vertical non horizontal Subset of TOP-REAL 2;
  Upper_Seq(C,n)/.1 = W-min L~Cage(C,n) by JORDAN1F:5;
  hence thesis by FINSEQ_6:43;
end;
