Séminaires : Séminaire de Logique Lyon-Paris

Equipe(s) : lm,
Responsables :O. Finkel, A. Khélif, S. Rideau, T. Tsankov, A. Vignati
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Salle : Zoom ID: 824 8220 9628; s'inscrire à la liste ou contacter silvain.rideau@imj-prg.fr pour le mot de passe.
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Orateur(s) Hector Pasten - PUC Chile,
Titre Diophantine sets of number fields and their rings of integers --- à 16h en salle 1016
Date25/02/2019
Horaire16:00 à 17:00
Diffusion
RésumeA subset of a ring is diophantine if it is positive existentially definable in the language of rings. In number fields or in their rings of integers, every diophantine set is listable (i.e. recursively enumerable) and one can ask whether every listable set is diophantine. For instance, a classical theorem of Davis, Matiyasevic, Putnam, and Robinson shows that for the usual integers Z the answer is positive. I will discuss some general conjectures and some partial results suggesting that in the number field case not every listable set is diophantine, while in the case of rings of integers every listable set should be diophantine.

SalleZoom ID: 824 8220 9628; s'inscrire à la liste ou contacter silvain.rideau@imj-prg.fr pour le mot de passe.
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