Tilings and patterns
Ininvertible cellular automata: a review
Physica D
Feynman and computation
Action, or the fungibility of computation
Feynman and computation
Structure and interpretation of classical mechanics
Structure and interpretation of classical mechanics
How to turn a second-order cellular automaton into a lattice gas: a new inversion scheme
Theoretical Computer Science - Special issue: Theoretical aspects of cellular automata
Theory of Self-Reproducing Automata
Theory of Self-Reproducing Automata
Specific ergodicity: an informative indicator for invertible computational media
Proceedings of the 2nd conference on Computing frontiers
When–and how–can a cellular automaton be rewritten as a lattice gas?
Theoretical Computer Science
Design of a reconfigurable pulsed quad-cell for cellular-automata-based conformal computing
International Journal of Reconfigurable Computing
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Ordinary crystallography deals with regular, discrete, static arrangements in space. Of course, dynamic considerations--and thus the additional dimension of time--must be introduced when one studies the origin of crystals (since they are emergent structures) and their physical properties such as conductivity and compressibility. The space and time of the dynamics in which the crystal is embedded are assumed to be those of ordinary continuous mechanics. In this paper, we take as the starting point a spacetime crystal, that is, the spacetime structure underlying a discrete and regular dynamics. A dynamics of this kind can be viewed as a "crystalline computer." After considering transformations that leave this structure invariant, we turn to the possible states of this crystal, that is, the discrete spacetime histories that can take place in it and how they transform under different crystal transformations. This introduction to spacetime crystallography provides the rationale for making certain definitions and addressing specific issues; presents the novel features of this approach to crystallography by analogy and by contrast with conventional crystallography; and raises issues that have no counterpart there.