 array of size (M-1)*LDW+1, that contains
        the destination offset  in U where the columns of W should be
        copied.
</PRE>
<PRE>
W       (local input)                 const double *
        On entry, W  is an array of size (LDW,M0+M1),  that  contains
        data to be copied into U.  For i in [M0..M0+M1),  the entries
        W(:,i) are copied into the row W0(i*LDW) of U.
</PRE>
<PRE>
LDW     (local input)                 const int
        On entry, LDW specifies the leading dimension of the a