A continuum of discrete systems

Howard A. Blair, Jagan Chidella, Fred Dushin, Audrey Ferry, Polar Humenn

Research output: Contribution to journalArticle

4 Scopus citations


We show how to regard covered logic programs as cellular automata. Covered logic programs are ones for which every variable occurring in the body of a given clause also occurs in the head of the same clause. We generalize the class of register machine programs to permit negative literals and characterize the members of this class of programs as n-state 2-dimensional cellular automata. We show how monadic covered programs, the class of which is computationally universal, can be regarded as 1-dimensional cellular automata. We show how to continuously (and differentiably) deform 1-dimensional cellular automata from one to another and understand the arrangement of these cellular automata in a separable Hilbert space over the real numbers. The embedding of the cellular automata of fixed radius r is a linear mapping into R22r+1 in which a cellular automaton's transition function is the attractor of a state-governed iterated function system of affine contraction mappings. The class of covered monadic programs having a particular fixed point has a uniform arrangement in an affine subspace of the Hilbert space ℓ2. Furthermore, these programs are construable as almost everywhere continuous functions from the unit interval {x

Original languageEnglish (US)
Pages (from-to)153-186
Number of pages34
JournalAnnals of Mathematics and Artificial Intelligence
Issue number2-4
StatePublished - 1997


ASJC Scopus subject areas

  • Artificial Intelligence
  • Applied Mathematics

Cite this

Blair, H. A., Chidella, J., Dushin, F., Ferry, A., & Humenn, P. (1997). A continuum of discrete systems. Annals of Mathematics and Artificial Intelligence, 21(2-4), 153-186.