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Two-by-two Substitution Systems and the Undecidability of the Domino Problem
Nicolas Ollinger 1
(2008-01-14)

Thanks to a careful study of elementary properties of two-by-two substitution systems, we give a complete self-contained elementary construction of an aperiodic tile set and sketch how to use this tile set to elementary prove the undecidability of the classical Domino Problem.
1:  Laboratoire d'informatique Fondamentale de Marseille (LIF)
CNRS : UMR6166 – Université de la Méditerranée - Aix-Marseille II – Université de Provence - Aix-Marseille I
Computer Science/Discrete Mathematics
aperiodic tile sets – formal languages – tilings – undecidability
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