An essay from the Dia Foundation regarding this genius and kindred spirit:
http://www.diaart.org/exhibs/darboven/kulturgeschichte/essay.html

“From the moment in the mid-sixties when she moved to New York City after a highly academic training at the Staatliche Hochschule für Bildende Künste in Hamburg, Hanne Darboven’s work has been allied with conceptual art practices. Based by the late sixties on various forms of numerical and mathematical writing, her systematic work securely occupied in the realm of abstraction and universality: “I only use numbers,” she explained, “because it is a way of writing without describing…. It has nothing to do with math-ematics. Nothing! I choose numbers because they are so constant, confined and artistic. Numbers are probably the only real discovery of mankind. A number of something (two chairs, or whatever) is something else. It’s not pure number and has other meanings.”1″