# Kerodon

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

Example 5.5.1.4. Let $X: \operatorname{{\bf \Delta }}^{\operatorname{op}} \rightarrow \operatorname{Set}$ be a simplicial set. Then $\int ^{\operatorname{{\bf \Delta }}} X$ is the category of simplices $\operatorname{{\bf \Delta }}_{X}$ introduced in Construction 1.1.8.19.