
theorem THJE:
  for n being Nat
    for u,v being Element of TOP-REAL n holds u + 0 * v = u
  proof
    let n be Nat;
    let u,v be Element of TOP-REAL n;
    0.TOP-REAL n = 0 * v by RLVECT_1:10;
    hence thesis;
  end;
