Let $F\colon \mathcal{C}\to \mathcal{D}$ be a functor.

  1. Characterisations. The following conditions are equivalent:
    1. The functor $F$ is injective on objects.
    2. The functor $F$ is an isocofibration in $\mathsf{Cats}_{\mathsf{2}}$.

Item 1: Characterisations
Omitted.


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