Example 11.4.0.4. Let $\aleph _0$ be the least infinite cardinal. Then $\aleph _0$ is strongly inaccessible. That is, the collection of finite sets is closed under finite products.
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
Example 11.4.0.4. Let $\aleph _0$ be the least infinite cardinal. Then $\aleph _0$ is strongly inaccessible. That is, the collection of finite sets is closed under finite products.