CHARLES HINMANFeigen, 24 East 81st. In his first one-man show, Hinman makes the old four-cornered canvas look pretty square. He stretches cotton duck over plywood frames in shapes that writhe up the wall, dangle in three-dimensional blocks, and seem to jump with shock waves of hard-edged color. Through Jan. 2.
ALBERTCHRISTJANER-Krasner, 1061 Madison Ave. at 80th. Working in watercolor on rice paper, the dean of Pratt Institute's art school marks his horizons with a single stroke, lets specks of light seep through waves of cool blues and greens. Through Jan. 2.