
<pre>   N      (input) INT
          The order of the matrix.  N &gt;= 1.</pre><p>
<pre>   V      (workspace) DOUBLE COMPLEX PRECISION array, dimension (N)   
          On the final return, V = A*W,  where  EST = norm(V)/norm(W)   
          (W is not returned).</pre><p>
<pre>   X      (input/output) DOUBLE COMPLEX PRECISION array, dimension (N)   
          On an intermediate return, X should be overwritten by   
                A * X,   if KASE=1,   
                A' * X,  if KASE=2,
          where A'