Sentences over Random Groups II: Sentences of Minimal Rank
Group Theory
2024-08-13 v2 Logic
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}.
Cite
@article{arxiv.2406.15089,
title = {Sentences over Random Groups II: Sentences of Minimal Rank},
author = {Sobhi Massalha},
journal= {arXiv preprint arXiv:2406.15089},
year = {2024}
}
Comments
53 pages