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Theses

Coloriage du plan discret par jeux de tuiles déterministes

Abstract : In this thesis, we study some properties of the sets of tilings generated by Wang tilesets that exhibit one or more directions of local determinism, focusing in particular on tilesets that are simultaneously deterministic in the four diagonal directions, referred to as 4-way deterministic. After having exposed an alternative construction of a 4-way deterministic aperiodic tileset, we study several decision problems on these objects and complete in particular Lukkarila’s result of undecidability of the Domino Problem in the 4-way deterministic setting proving the undecidability of the 4-way deterministic periodic Domino Problem. We also prove that some complex families of colorings of the plane such that those generated by substitutions remain sofic in the 4-way deterministic setting. We propose a bi-determinization of the constructions by Durand, Romashchenko and Shen of fixed-point tilesets and give some first applications. Finally, we investigate the idea of extending the radius of the local rule of determinism in order to reduce the set of directions of expansiveness and thus allow the local realization of non-trivial particles and collisions systems. We introduce a new and convenient syntactic model to deal with radius two and revisit some of Lukkarila’s problems in this setting.
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Bastien Le Gloannec. Coloriage du plan discret par jeux de tuiles déterministes. Autre [cs.OH]. Université d'Orléans, 2014. Français. ⟨NNT : 2014ORLE2069⟩. ⟨tel-01288501⟩

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