[SOLVED] von Neumann Ordinals

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• March 19th 2010, 09:47 AM
Deadstar
[SOLVED] von Neumann Ordinals
Let $\alpha$ and $\beta$ be two von Neumann ordinals. Show that $\alpha \subset \beta$ if and only if $\alpha \in \beta$ .

<= is easy enough

=> is where my mind breaks down...
• March 19th 2010, 11:08 AM
Deadstar
Ah sugar didn't mean to post this.

Internet was disconnecting as I hit create new thread so thought it never got made... Can just ignore it...