Hom ω-categories of a computad are free

We provide a new description of the hom functor on weak ω-categories, and we 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 ω-categories. Using the same technique, we define the opposite of an ω-category with respect to a set of dimensions, and we 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.

Publication Details

Journal
Apollo (University of Cambridge)
Published
2025-11-20
DOI
https://doi.org/10.17863/cam.123304
Primary Topic
Homotopy and Cohomology in Algebraic Topology
Type
article
Field-Weighted Citation Impact
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article

Hom ω-categories of a computad are free

Apollo (University of Cambridge)
Homotopy and Cohomology in Algebraic Topology
article

Hom ω-categories of a computad are free

article en

Abstract

We provide a new description of the hom functor on weak ω-categories, and we 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 ω-categories. Using the same technique, we define the opposite of an ω-category with respect to a set of dimensions, and we 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.

Apollo (University of Cambridge)
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Homotopy and Cohomology in Algebraic Topology
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Hom ω-categories of a computad are free · Apollo (University of Cambridge) (2025) | TGRS Research Map | TGRS