The rivalry hostilities started more than an hour before tipoff. In the upper deck of the Galen Center, a group of UCLA fans broke out an eight-clap. Hearing the audible affront, USC students gathered behind a nearby basket clapped back. That was about as spicy as it got Sunday afternoon. Taking a double-digit lead less than five minutes into the game, the second-ranked Bruins ran away with a 73-50 victory that served as affirmation of the teams’ differing trajectories. While UCLA (28-1, 18-0