Kerodon

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

Example 1.1.2.13. The horn $\Lambda ^{0}_{0}$ is the empty simplicial set (and therefore coincides with the boundary $\operatorname{\partial \Delta }^{0}$).