Got me some energy e-states Psi(x,t) = blah blah.. I am asked to normalize, blh blah blah.. got that. Then i'm asked to sketch mod(Psi1).. what the heck is mod? I know what mod is in regards to number theory, but obviously this is a different term. Can't find it for the life of me on any sites, or in any books.. I vaguely remember it from Modern a few years back.. Anyone? Anyone?