Example 5.2.6.4. 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 1.1.3.9.
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$