Jules Olitski: The Late Paintings, a Celebration (Knoedler & Company, 19 E. 70, up through Jan. 5). The final canvases of the once-fashionable American color-field abstractionist who outlived his fame but kept on painting–brilliantly. I’ve been a passionate admirer of Olitski’s work ever since I finally caught up with him two years ago. This much-needed show will give you a chance to see where he wound up at the end of a long, excitingly unpredictable career (TT).