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Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
May 10, 2010 at 20:11 comment added user2734 OK, now I have a (hopefully) correct direct proof.
May 10, 2010 at 20:10 history edited user2734 CC BY-SA 2.5
corrected the example of dnamical systems
May 10, 2010 at 9:01 comment added user2734 Oops, the part concerning dynamical systems is wrong: the category of algebras for the identity monad on $\mathbf{Set}$ is just $\mathbf{Set}$. But I think that I can prove creation directly in this example, and I will soon either send the correction or declare the last example as open.
May 5, 2010 at 15:14 vote accept Qiaochu Yuan
May 5, 2010 at 12:51 history answered user2734 CC BY-SA 2.5