# Kerodon

$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$ $\newcommand\empty{}$

Example 4.5.2.3. Let $F: \operatorname{\mathcal{C}}\rightarrow \operatorname{\mathcal{D}}$ be a functor of $\infty$-categories. Then $F$ is a categorical equivalence (in the sense of Definition 4.5.2.1) if and only if it is an equivalence of $\infty$-categories (in the sense of Definition 4.5.1.10). Both conditions are equivalent to the assertion that for every $\infty$-category $\operatorname{\mathcal{E}}$, precomposition with $F$ induces a bijection $\operatorname{Hom}_{ \mathrm{h} \mathit{\operatorname{Cat}}_{\infty } }( \operatorname{\mathcal{D}}, \operatorname{\mathcal{E}}) \rightarrow \operatorname{Hom}_{ \mathrm{h} \mathit{\operatorname{Cat}}_{\infty } }( \operatorname{\mathcal{C}}, \operatorname{\mathcal{E}})$.