title: Difference between canonical cover and minimal cover
body: <p>I know how to calculate a minimal cover--
  ensure each functional dependency only has one attribute on the RHS,
  remove extraneous/redundant LHS attributes by calculating the closure of each,
  examining all FD's, seeing if any can be removed (again by calculating a closure).</p>
  <p>Is 'canonical' cover just another word for the same thing?</p>