      (input) INTEGER
         The number of rows of the matrix A.  M &gt;= 0.

  N      (input) INTEGER
         The number of columns of the matrix A.  N &gt;= 0.

  DIAG   (input) DOUBLE PRECISION
         The scalar DIAG.

  A      (input) DOUBLE PRECISION array, dimension (LDA,N)
         The leading M-by-N part of this array must contain the
         matrix A.  If JOB = 'U', only the upper triangle or
         trapezoid is accessed; if JOB = 'L', only the lower
         triangle or trapezoid is access