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arXiv · 2406.15089

Sentences over Random Groups II: Sentences of Minimal Rank

Sobhi Massalha
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Abstract

Random groups of density d<\frac{1}{2} are infinite hyperbolic, and of density d>\frac{1}{2} are finite. We prove the existence of a uniform quantifier elimination procedure for formulas of minimal rank (probably the superstable part of the theory). Namely, given a minimal rank formula V(p), we prove the existence of a formula \varphi(p) that belongs to the Boolean algebra of two quantifiers, so that the two formulas V(p) and \varphi(p) define the same set over the free group F_{k} and over a random group of density d<\frac{1}{2}. We conclude that any given sentence of minimal rank is a truth sentence over the free group F_{k} if and only if it is a truth sentence over random groups of density d<\frac{1}{2}.

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Sobhi Massalha. 2024-06-21. Sentences over Random Groups II: Sentences of Minimal Rank. https://arxiv.org/abs/2406.15089

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