Hom ω$\omega$‐categories of a computad are free

Abstract We provide a new description of the hom functor on weak ‐categories, and show that it admits a left adjoint that we call the suspension functor. We then show that the hom functor preserves the property of being free on a computad, in contrast to the hom functor for strict ‐categories. Using the same technique, we define the opposite of an ‐category with respect to a set of dimensions, and show that this construction also preserves the property of being free on a computad. Finally, we show that the constructions of opposites and homs commute.

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Publication Details

Journal
Journal of the London Mathematical Society
Published
2025-11-26
DOI
https://doi.org/10.1112/jlms.70367
Primary Topic
Homotopy and Cohomology in Algebraic Topology
Type
article
Field-Weighted Citation Impact
0.00
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article

Hom ω$\omega$‐categories of a computad are free

Thibaut Benjamin, Ioannis Markakis
Journal of the London Mathematical Society
Homotopy and Cohomology in Algebraic Topology
article

Hom ω$\omega$‐categories of a computad are free

Thibaut Benjamin, Ioannis Markakis
article en

Abstract

Abstract We provide a new description of the hom functor on weak ‐categories, and show that it admits a left adjoint that we call the suspension functor. We then show that the hom functor preserves the property of being free on a computad, in contrast to the hom functor for strict ‐categories. Using the same technique, we define the opposite of an ‐category with respect to a set of dimensions, and show that this construction also preserves the property of being free on a computad. Finally, we show that the constructions of opposites and homs commute.

Journal of the London Mathematical SocietyVol. 112(6)
Centre National de la Recherche Scientifique (FR), University of Cambridge (GB), Université Paris-Saclay (FR), CentraleSupélec (FR)
Openalex Percentile: Top 58%
Homotopy and Cohomology in Algebraic Topology
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