Grothendieck rings of ordered subgroups of $\mathbb{Q}$

Neer Bhardwaj, Frodo Moonen

Let $G$ be a proper subgroup of $\mathbb{Q}$ and $S_G$ be the set of primes $p$ for which $G$ is $p$-divisible. We show that the model-theoretic Grothendieck ring of the ordered ab…