“Anthony Caro: Sculpture” at Artemis Greenberg Van Doren Gallery, through December 27, (730 Fifth Avenue at 57th Street, 212 445 0444) “Michael Steiner: Sculpture” at Salander-O’Reilly Galleries through January 3 (20 East 79 Street, between Fifth and Madison Avenues, 212 879 6606) “Morris Louis” at Paul Kasmin Gallery, through December 31 (293 Tenth Avenue at … Continued