Remark 3.6.1.5. Let $f: X \twoheadrightarrow Y$ be an epimorphism of simplicial sets. If $X$ is finite, then $Y$ is also finite.
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
Remark 3.6.1.5. Let $f: X \twoheadrightarrow Y$ be an epimorphism of simplicial sets. If $X$ is finite, then $Y$ is also finite.