Dedekind cut
Frampton's films are often titled after specialized scientific disciplines, as in the case of "Maxwell's Demon", "Prince Rupert's Drops", and "Hapax Legomena". In the early 1960s minimalist artist Carl Andre described to Frampton the Dedekind cut, which partitions a totally ordered set into two subsets, one of whose elements are all less than those of the other, and can be used to construct the real numbers. He became interested in the relationship between set theory and film while working on his ongoing project "Magellan". Frampton titled "Zorns Lemma" after Zorn's lemma (also known as the Kuratowski–Zorn lemma), a proposition of set theory formulated by mathematician Max Zorn in 1935. Zorn's lemma describes partially ordered sets where every totally ordered subset has an upper bound. The letters and images in "Zorns Lemma" are sets whose order is discovered during the course of the film.