robert irwin at pace (east 57th st, extended til 7/13/2012): a small show worth seeing. also the first retrospective i've seen featuring only new work. this is possible only if the work itself is an evolution of principles and approaches (the refinement of style or a function generator), rather than an accumulation of concrete pieces (a set of works or fixed points). in this way of thinking about development, late work is better for being both more and less: more comprehensive in representing elements of a style and including fewer elements that are extraneous.
the front desk was unamused by my suggestion that one of the white panels could stand a more rigorous cleaning. more on irwin here and here, and a nice little film about the retrospective here.