reserve T,U for non empty TopSpace;
reserve t for Point of T;
reserve n for Nat;

theorem Th5:
  for C1,C2 being constant Loop of t holds
  C1, C2 are_homotopic
  proof
    let C1,C2 be constant Loop of t;
    C1 = I[01] --> t by BORSUK_2:5 .= C2 by BORSUK_2:5;
    hence thesis by BORSUK_2:12;
  end;
