TO: Guy Macon
Thank you very much for your comments. I've tried your suggestion to prove the
point. Instead of flipping a coin I did the following calculation. If you
flip an unbiased coin 2 million times it will come up heads 1 million times and
tails 1 million times. Thus there will be 1 million moves in the positive
direction and 1 million moves in the negative direction. Since the moves are
commutative, i.e. a+b=b+a, the net result is no shift. Now if we bias the coin,
there will be a drift in one direction or another depending on the bias.
There was a recent comment made that the bias is sort of site dependent (my
words not his)
In the case of polymer chain statistics, the bias comes from unequall
energy states or you cant go where you came from.