Anyone passingly familiar with the art of Richard Diebenkorn knows of his acknowledged debt to Henri Matisse. The exhibition Matisse/Diebenkorn at the San Francisco Museum of Modern Art (SFMoMA) tallies that debt as no other curatorial project has before, thematically grouping 100 paintings (40 by Matisse, 60 by Diebenkorn) and a few drawings by the two, who never met. Despite the bounty of exemp