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Timeline for Example of an unnatural isomorphism

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Oct 14, 2013 at 19:30 comment added Emil Jeřábek Which is undoubtedly the reason why this example is mentioned in the question itself.
S Oct 14, 2013 at 18:58 history answered Michael Barr CC BY-SA 3.0
S Oct 14, 2013 at 18:58 history made wiki Post Made Community Wiki by Michael Barr