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May 27, 2010 at 20:16 comment added Todd Trimble But surely the coalgebraic applications of bisimulations and the applications to ZF - Foundation + Anti-foundation are closely connected? In ordinary ZF, sets are constructed recursively, whereas in the alternative set theory using AFA, sets are constructed corecursively. There's a little bit on this at the nLab under the article "axiom of foundation".
May 27, 2010 at 19:43 comment added supercooldave Of course. I'd totally forgotten about Vicious Circles.
May 27, 2010 at 19:41 history answered Justin Palumbo CC BY-SA 2.5