title: A Note on Sugihara's Claim.
abstract: This correspondence debates a theorem formulated by K. Sugihara in a recent publication. The theorem deals with the mathematical structures of line drawings, and serves as a basis for a substantial part of the paper. This note claims that the theorem as formulated is not valid. The claim is substantiated by a counterexample.
authors.affiliation: Cognitive Information Processing Group, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139. Rafael, Haifa, Israel.
authors.forename: R
authors.initials: R
authors.lastname: Shapira