Harold Cohen, “74D10” (1974), computer-generated drawing in ink on paper, hand embellished with colored pencil, 21 x 17 inches (collection of the Carl & Marilynn Thoma Foundation; all photos Justin ...

There were two exhibitions in New York this spring — to which you can now add a third — that shed new light on what was happening in abstract art in France after World War II. The first two ...