
theorem Th10:
  for n being Nat holds for x being Element of dyadic(n) holds
  x = axis(x)/(2|^n) & axis(x) <= (2|^n)
proof
  let n be Nat;
  let x be Element of dyadic(n);
  ex i being Nat st i <= 2|^n & x = i/(2|^n) by Def1;
  hence thesis by Def5;
end;
