
theorem
  for V,W be non empty ModuleStr over F_Complex, f be Form of V,W holds
  (f*')*' = f
proof
  let V,W be non empty ModuleStr over F_Complex;
  let f be Form of V,W;
  now
    let v be Vector of V, w be Vector of W;
    thus (f*'*').(v,w) = ((f*').(v,w))*' by Def8
      .= (f.(v,w))*'*' by Def8
      .= f.(v,w);
  end;
  hence thesis;
end;
