English

Infinitary combinatorics in condensed math and strong homology

Algebraic Topology 2025-08-12 v2 Category Theory Logic

Abstract

Recent advances in our understanding of higher derived limits carry multiple implications in the fields of condensed and pyknotic mathematics, as well as for the study of strong homology. These implications are thematically diverse, pertaining, for example, to the sheaf theory of extremally disconnected spaces, to Banach--Smith duality, to the productivity of compact projective condensed anima, and to the structure of the derived category of condensed abelian groups. Underlying each of these implications are the combinatorics of multidimensionally coherent families of functions of small infinite cardinal height, and it is for this reason that we convene accounts of them together herein.

Keywords

Cite

@article{arxiv.2412.19605,
  title  = {Infinitary combinatorics in condensed math and strong homology},
  author = {Jeffrey Bergfalk and Chris Lambie-Hanson},
  journal= {arXiv preprint arXiv:2412.19605},
  year   = {2025}
}

Comments

48 pages. Revised in accordance with referee feedback; to appear in Selecta Mathematica