
theorem Th02:
  for P being POINT of BK-model-Plane holds
  Tn2TR BK_to_T2 P in inside_of_circle(0,0,1)
  proof
    let P be POINT of BK-model-Plane;
    consider p be Element of BK_model such that
    P = p and
A1: BK_to_T2 P = BK_to_REAL2 p by Def01;
    reconsider Q = BK_to_T2 P as POINT of TarskiEuclid2Space;
    thus thesis by A1;
  end;
