Date: Thu, 08 May 1997 From: chang@phys.nthu.edu.tw ([amadeus on the run]) Subject: a group theory question I need to know how many singlets are contained in the cross product of the representations 3^n X \bar{3}^m where 3 and \bar{3} are fundamental representations of SU(3) and the difference of n and m is multiple of 3 of course. Do you think anybody ever considered and solved such question? Darwin N. Tsing-Hua U. Hsinchu Taiwan