All of those need to publish papers with each other to qualify, probably. Maybe we can find another measure? https://en.wikipedia.org/wiki/Erd%C5%91s_number ht

All of those need to publish papers with each other to qualify, probably. Maybe we can find another measure? https://en.wikipedia.org/wiki/Erd%C5%91s_number https://en.wikipedia.org/wiki/Erd%C5%91s_number