        equation.
          On exit, the leading N-by-N part of this array contains
          the upper triangular Cholesky factor U of the solution
          matrix X of the problem, X = op(U)**H * op(U).
          If M = 0 and N &gt; 0, then U is set to zero.

  LDB     INTEGER
          The leading dimension of the array B.
          LDB &gt;= MAX(1,N,M), if TRANS = 'N';
          LDB &gt;= MAX(1,N),   if TRANS = 'C'.

  SCALE   (output) DOUBLE PRECISION
          The scale factor, scale, set less than o