Open Publishing Association, Electronic Proceedings in Theoretical Computer Science, (144), p. 30-40
DOI: 10.4204/eptcs.144.3
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We formalize the intuitive idea of a labelled discrete surface which evolves in time, subject to two natural constraints: the evolution does not propagate information too fast; and it acts everywhere the same. ; Comment: In Proceedings DCM 2013, arXiv:1403.7685