Is Robert Ryman, the master of the white-on-white painting for the past half-century or so, a covert “Light and Space” artist? The Dia Art Foundation’s new exhibition in Chelsea, “Robert Ryman: Real Light, 1958-2007,” certainly encourages us to see him this way—as another example of the California-centric, Minimalism-influenced movement that includes James Turrell, Robert Irwin, […]