l input)                 const int
        On entry, N specifies the length of the rows of U that should
        be copied into A. N must be at least zero.
</PRE>
<PRE>
U       (local input/output)          double *
        On entry,  U  points to  an array of dimension (LDU,N).  This
        array contains the rows that are to be copied into A.
</PRE>
<PRE>
LDU     (local input)                 const int
        On entry, LDU specifies the leading dimension of the array U.
        LDU must be at least MAX(