i=0 normalize?
  1. Start with all hub scores and all authority scores equal to 1.
  2. Choose a number of steps, k.
  3. Perform a sequence of k hub-authority updates. Each update works as follows:
    1. Apply the Authority Update Rule to the current set of scores: For each document p, update the authority score to be the sum of the hub scores of all the documents that link to it.
    2. Then apply the Hub Update Rule using the resulting set of scores: For each document p, update the hub score to be the sum of the authority scores of all the documents that it links to.
  4. (Optionally) normalize scores.