I listed all the math I know of that seems relevant to Friendliness philosophy and isn't particularly obscure (like metacompilation). What did I miss?
I would remove from the list before adding to it. I also wouldn't make the claim:
It doesn't include useless things, like math.
I just realized that my 'Interests' list on The Facebook made an okay ad hoc list of fields potentially related to Friendliness-like philosophy. They sorta kinda flow into each other by relatedness and are not particularly prioritized. This is my own incomplete list, though it was largely inspired by many conversations with Singularity Institute folk. Plus signs mean I'm moderately more certain that the existing field (or some rationalist re-interpretation of it) has useful insights.
Friendliness philosophy: