# Kerodon

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

Remark 4.2.3.13. Let $f: X \rightarrow S$ be a morphism of simplicial sets. If $f$ is either a left covering map or a right covering map, then it is an inner covering map (see Definition 4.1.5.1).