“Collaborations” brought together three artists with quite different artistic backgrounds, and representing almost three generations. Jean-Michel Basquiat, Francesco Clemente, and Andy Warhol form an illustrious group, and one approached the show with high expectations, yet the results of these team efforts are disappointing. The paintings, all 1984, are essentially no more than the products of addition. Basquiat’s scribbles, Clemente’s sensuous figures and faces, and Warhol’s silkscreen techniques all display visual brilliance, but rarely do they engage in any real dialogue or the kind of