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Jun 9, 2011 at 18:44 vote accept Gérard Lang
Jun 12, 2011 at 18:28
Jun 9, 2011 at 2:01 comment added Joel David Hamkins Yes, I had meant what I wrote originally, since that is how I had conceived it, but your correction is also true, since x={x} anyway. So it doesn't matter! Indeed, we can nest in a few more layers of braces and it would be the same set!
Jun 9, 2011 at 1:53 comment added François G. Dorais Oups! I made a small correction, but I now think you meant what you originally wrote...
Jun 9, 2011 at 1:49 history edited François G. Dorais CC BY-SA 3.0
minor correction
Jun 8, 2011 at 22:58 history answered Joel David Hamkins CC BY-SA 3.0