ata or restart file is read

Default = 0 0 0 (periodic in all dimensions)
</PRE>
<HR>
<H3>
<A NAME="_cch3_931276941">pppm mesh </A></H3>
<UL>
    <LI>
    1st parameter = # of mesh points in x direction 
    <LI>
    2nd parameter = # of mesh points in y direction 
    <LI>
    3rd parameter = # of mesh points in z direction 
</UL>
<PRE>
specify the mesh size used by &quot;coulomb style pppm&quot;
mesh dimensions that are power-of-two are fastest for FFTs, but any sizes
  can be used that are supported by n