reserve p,p1,p2,p3,p11,p22,q,q1,q2 for Point of TOP-REAL 2,
  f,h for FinSequence of TOP-REAL 2,
  r,r1,r2,s,s1,s2 for Real,
  u,u1,u2,u5 for Point of Euclid 2,
  n,m,i,j,k for Nat,
  N for Nat,
  x,y,z for set;

theorem Th6:
  p`1 = q`1 & p`2 = q`2 implies p=q
proof
  assume p`1 = q`1 & p`2 = q`2;
  hence p=|[q`1,q`2]| by EUCLID:53
    .= q by EUCLID:53;
end;
