Universal Skolem Sets

It is a longstanding open problem whether there is an algorithm to decide the Skolem Problem for linear recurrence sequences, namely whether a given such sequence has a zero term. In this paper we introduce the notion of a Universal Skolem Set: an infinite subset \mathcal{S} of the positive integers...

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Veröffentlicht in:Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer Science S. 1 - 6
Hauptverfasser: Luca, Florian, Ouaknine, Joel, Worrell, James
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: IEEE 29.06.2021
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Zusammenfassung:It is a longstanding open problem whether there is an algorithm to decide the Skolem Problem for linear recurrence sequences, namely whether a given such sequence has a zero term. In this paper we introduce the notion of a Universal Skolem Set: an infinite subset \mathcal{S} of the positive integers such that there is an effective procedure that inputs a linear recurrence sequence u = (u(n)) n ≥ 0 and decides whether u(n) = 0 for some n \in \mathcal{S}. The main technical contribution of the paper is to exhibit such a set.
DOI:10.1109/LICS52264.2021.9470513