Kerodon

$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$ $\newcommand\empty{}$
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$

Remark 1.1.3.7. Let $S_{\bullet }$ be a simplicial set and let $\sigma $ be a nondegenerate $n$-simplex of $S_{\bullet }$. Then $\sigma $ is contained in $\operatorname{sk}_{k}( S_{\bullet } )$ if and only if $n \leq k$.