**aff@duke.UUCP (Amr F. Fahmy)** (02/12/85)

There is an error in the problem I posted, the problem should read : WHAT IS : S S S S S S S S S S 1 2 3 n S .... S X X X .... X dX dX dX ... dX S S 1 2 3 n 1 2 3 n S S i=n sigma X = 1 i=1 i instead of : WHAT IS : 1 1 S S S S S S S S S S 1 2 3 n S .... S X X X .... X dX dX dX ... dX S S 1 2 3 n 1 2 3 n S S 0 0 I am very sorry if some people have already wasted some time on the first problem. Thanks to kpv@unc, I revised the problem and corrected it. Please send your answer to aff@duke or post the answer on the net. Thanks very much.