w coordinate of the process
        that possesses the row  I.  RSRC  must  be at least zero  and
        strictly less than NPROW.
</PRE>
<PRE>
CSRC    (global input)                const int
        On entry, CSRC specifies the column coordinate of the process
        that possesses the column J. CSRC  must be at least zero  and
        strictly less than NPCOL.
</PRE>
<PRE>
MYROW   (local input)                 const int
        On entry, MYROW  specifies my  row process  coordinate in the
        grid. 