Real-time language recognition by one-dimensional cellular automata

  • Authors:
  • Alvy Ray Smith, III

  • Affiliations:
  • -

  • Venue:
  • Journal of Computer and System Sciences
  • Year:
  • 1972

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Abstract

Pattern recognition by parallel devices is investigated by studying the formal language recognition capabilities of one-dimensional cellular automata. The precise relationships of cellular automata to iterative automata and to Turing machines are established: In both cases, cellular automata are inherently faster. The relationship of context-free languages to the languages recognized in real time by bounded cellular automata is detailed. In particular, nondeterministic bounded cellular automata can recognize the context-free languages in real time. The deterministic case remains open, but many partial results are derived. Finally, closure properties and cellular automata transformation lemmas are presented.