is available through
      <a href = "http://lib.stat.cmu.edu/apstat">STATLIB</a>.
    </p>

    <p>
      In the K-Means problem, a set of N points X(I) in M-dimensions is
      given.  The goal is to arrange these points into K clusters,
      with each cluster having a representative point Z(J), usually
      chosen as the centroid of the points in the cluster.  The energy
      of each cluster is <pre>
        E(J) = Sum ( all points X(I) in cluster J ) || X(I) - Z(J) ||^2
      </pre>
    </p>

    <p>