English

On a simplicial monoid whose underlying simplicial set is not a quasi-category

Category Theory 2020-06-23 v2 Algebraic Topology Combinatorics

Abstract

It is well known that the underlying simplicial set of any simplicial group is a Kan complex. Roughly speaking, Kan complex is an infinite-dimensional analogue of groupoid, and the relation between groupoids and categories resembles that between groups and monoids. Thus one may ask if the underlying simplicial set of each simplicial monoid is a quasi-category. In this short note, we construct a simplicial monoid whose underlying simplicial set is not a quasi-category.

Keywords

Cite

@article{arxiv.2006.01403,
  title  = {On a simplicial monoid whose underlying simplicial set is not a quasi-category},
  author = {Ryo Horiuchi},
  journal= {arXiv preprint arXiv:2006.01403},
  year   = {2020}
}

Comments

Fixed typos

R2 v1 2026-06-23T15:58:58.300Z