CHRISTOPHER WILMARTH Betty Cuningham Gallery through December 3 (541 W 25 Street between 10 and 11 Avenues, 212 242 2772) BARRY LE VA Mary Boone Gallery through December 17 (745 Fifth Avenue at 57 Street, 212 752 2929) Think of Minimalism, the extremist art revolution of the 1960s, and what comes to mind are austere … Continued