Year: 2026
Type: preprint
Abstract: Motivated by the desire to turn the cobordism hypothesis (a statement about the universal property of some $n$-category of bordisms) into a $1$-categorical statement, we prove that all $n$-categories can be modeled by \emph{$n$-cospan contexts}: these are $1$-categories equipped with a collection of iterated cospans that satisfy a composition property in terms of pushouts. In particular, we construct an adjunction from $\mathsf{Cat}_n$ to the category of $n$-cospan contexts which simultaneously generalizes the $n$-fold span construction of Haugseng and the twisted arrow category construction (when $n = 1$).
Source: arXiv (Cornell University)
Author: Riva, Lorenzo
Language: English
Subfield: Mathematical Physics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223018187