
theorem Th35:
  for R being RelStr st R is empty holds R is Dickson
proof
  let R be RelStr such that
A1: R is empty;
  now
    let N be Subset of R;
    take B = {};
    N = {} the carrier of R by A1;
    hence B is_Dickson-basis_of N,R;
    thus B is finite;
  end;
  hence thesis;
end;
