/sci/ - Science & Math

From the same guy who brought you The Game Of Life(tm)

>>8928507
Here's one: the surreal number [math]1-(0|y \in \cup_{n\in \mathbb{N}}S_n:y>0)[/math],
where [math]S_n=\{(x,y)|x,y\subseteq\cup_{i<n}S_i\}[/math] is inductively defined with [math]S_0=(0,0)[/math].