User blog comment:Sait2000/Base-k Arrow Notation/@comment-223.255.230.51-20141219131441/@comment-180.214.233.13-20141219185410

things like "set of all sets"     ,if you tring to expand it then it will be silly things. like"set of all sets of all sets of all sets......              von neumann universe of von neumann universes of von neumann universes......