English

Extending Hrushovski's groupoid-cover correspondence using simplicial groupoids

Logic 2024-02-15 v4

Abstract

Hrushovski's suggestion, given in ["Groupoids, imaginaries and internal covers," Turkish Journal of Mathematics , 2012], to capture the structure of the 1-analysable covers of a theory T using simplicial groupoids definable in T is realized here. The ideas of Haykazyan and Moosa, found in ["Functoriality and uniformity in Hrushovski's groupoid-cover correspondence," Annals of Pure and Applied Logic , 2018] are used, and extended, to define an equivalence of categories. Finally, a couple of examples are studied with these new tools.

Keywords

Cite

@article{arxiv.2009.13870,
  title  = {Extending Hrushovski's groupoid-cover correspondence using simplicial groupoids},
  author = {Paul Z. Wang},
  journal= {arXiv preprint arXiv:2009.13870},
  year   = {2024}
}

Comments

55 pages, made the author name consistent with other submissions

R2 v1 2026-06-23T18:52:21.617Z