Aleph-Null

Theorem
Let $\omega$ denote the minimal infinite successor set.


 * $\aleph_0 = \omega$ where $\aleph$ denotes the aleph function.

Proof
For all $n \in \omega$, $n \notin \mathcal N’$ by the definition of the infinite cardinal class.

Therefore, $\omega \le \aleph_0$.

Moreover, $\omega \in \mathcal N’$ by Minimal Infinite Successor Set is Infinite Cardinal.

Therefore, $\aleph_x = \omega$ for some ordinal $x$.

It follows that $\aleph_0 \le \aleph_x$ since $0 \le x$ and the definition of the aleph function, so $\aleph_0 \le \omega$.

Thus, $\aleph_0 = \omega$.