Metric enrichment, finite generation, and the path comonad
Abstract
We prove a number of results involving categories enriched over \textsc{CMet}, the category of complete metric spaces with possibly infinite distances. The category \textsc{CPMet} of intrinsic complete metric spaces is locally -presentable, closed monoidal, and comonadic over \textsc{CMet}. We also prove that the category \textsc{CCMet} of convex complete metric spaces is not closed monoidal and characterize the isometry--generated objects in \textsc{CMet}, \textsc{CPMet} and \textsc{CCMet}, answering questions by Di Liberti and Rosick\'{y}. Other results include the automatic completeness of a colimit of bi-Lipschitz morphisms of complete metric spaces and a characterization of those pairs (metric space, unital -algebra) that have a tensor product in the \textsc{CMet}-enriched category of unital -algebras.
Keywords
Cite
@article{arxiv.2205.12666,
title = {Metric enrichment, finite generation, and the path comonad},
author = {Alexandru Chirvasitu},
journal= {arXiv preprint arXiv:2205.12666},
year = {2022}
}
Comments
36 pages + references