Mira Schendel’s “Sarrafos” works are stunning in their complex simplicity: A protruding black bar is slicing the space of stark-white rectangles, simultaneously dividing space and creating volume which is demanded back from the viewer. At the same time, the bar casts a shadow which in turn creates a third dimension. Separate but together, Schendel’s Sarrafos works are among the earliest successful amalgamations between sculpture and painting. At Hauser & Wirth through October 21.