Noetherianity for infinite-dimensional toric varieties

Abstract

We prove that many families of toric ideals stabilize up to symmetry. Our results imply Hillar-Sullivant's Independent Set Theorem and settle afformatively questions in work by Aschenbrenner-Hillar, Hillar-Sullivant, and Hillar-Martin del Campo. Our approach involves splitting an equivariant monomial map into a part for which we have an explicit degree bound of the kernel, and a part for which we can prove that the source, a so-called matching monoid, is equivariantly Noetherian