
    2nd parameter = neighboring style: 0 = N^2, 1 = binning 
    <LI>
    3rd parameter = build neighbor list every this many steps (see next 
    param) 
    <LI>
    4th parameter = delay building until after this many steps since last 
    build 
    <LI>
    5th parameter = build criteria: 0 = always build, 1 = only build if 
    some atom has moved 1/2 or more of the skin thickness 
</UL>
<PRE>
factors that affect how and when neighbor lists are constructed
the binning style is almost always faster th