English

Topological reconstruction theorems over uncountable algebraically closed fields

Algebraic Geometry 2026-07-16 v1

Abstract

Working over uncountable algebraically closed fields, we extend the theorems of Koll\'ar-Lieblich-Olsson-Sawin on reconstructing varieties from their Zariski topological spaces. In particular, we adapt their results to arbitrary quasi-projective varieties in arbitrary characteristic, and thus we give positive answers to each of the relevant `speculations' made by the original authors in our setting. Our proofs use techniques from model theory: in particular, we employ a general model-theoretic setting for algebro-geometric reconstruction problems, known as the `Zilber trichotomy for ACF-relics'.

Cite

@article{arxiv.2607.14472,
  title  = {Topological reconstruction theorems over uncountable algebraically closed fields},
  author = {Benjamin Castle and Ronan O'Gorman},
  journal= {arXiv preprint arXiv:2607.14472},
  year   = {2026}
}

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60 pages