English

Higher presentable categories and limits

Category Theory 2025-10-16 v1 Algebraic Topology Logic

Abstract

Stefanich generalized the notion of (locally) presentable (,1)(\infty, 1)-category to the notion of presentable (,n)(\infty, n)-category. We give a new description based on the new notion of κ\kappa-compactly generated (,n)(\infty, n)-category, which avoids universe enlargement. Using the new definition, we prove the underlying functor of a morphism between presentable (,2)(\infty, 2)-categories has a right adjoint. In particular, any presentable (,2)(\infty, 2)-category has limits. We also prove that this fails drastically when we go higher: The unit presentable (,3)(\infty, 3)-category, i.e., the category of presentable (,2)(\infty, 2)-categories, does not have limits. This settles Stefanich's conjecture in the negative.

Keywords

Cite

@article{arxiv.2510.13503,
  title  = {Higher presentable categories and limits},
  author = {Ko Aoki},
  journal= {arXiv preprint arXiv:2510.13503},
  year   = {2025}
}

Comments

14 pages

R2 v1 2026-07-01T06:38:51.713Z