User blog comment:MilkyWay90/Not-Registered Users, tell your Googology ideas in the comments/@comment-2601:142:2:EC49:247C:A73D:AD4A:5ED9-20180803125948/@comment-35392788-20180806143157

It's undefined with ordinals. It's easy to deduce some rules, but the most intuitive ruleset gets stuck at e0