English

Enriched pro-categories and shapes

Category Theory 2019-05-20 v1

Abstract

Given a category C\mathcal C and a directed partially ordered set JJ, a certain category proJCpro^J -\mathcal C on inverse systems in C\mathcal C is constructed such that the ordinary pro-category proCpro-\mathcal C is the most special case of a singleton J{1}J \equiv \{1\}. Further, the known propro^*-category proCpro ^*-\mathcal C becomes proNCpro ^{\mathbb N }-\mathcal C. Moreover, given a pro-reflective category pair (C,D)(\mathcal C, \mathcal D), the JJ-shape category Sh(C,D)JSh^J_{(C,\mathcal D)} and the corresponding JJ-shape functor SJS^J are constructed which, in mentioned special cases, become the well known ones. Among several important properties, the continuity theorem for a J-shape category is established. It implies the "JJ-shape theory" is a genuine one such that the shape and the coarse shape theory are its very special examples.

Keywords

Cite

@article{arxiv.1905.07181,
  title  = {Enriched pro-categories and shapes},
  author = {Nikica Uglešić},
  journal= {arXiv preprint arXiv:1905.07181},
  year   = {2019}
}
R2 v1 2026-06-23T09:10:25.846Z