Kerodon

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

Example 1.2.1.7. For each $n \geq 0$, the standard $n$-simplex $\Delta ^{n}$ is connected.