Talk:Proof: Difference between revisions
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--[[User:Rdm|Rdm]] 19:44, 13 May 2012 (UTC)
: Put differently: the task asks for a countable set of natural numbers. This would be trivial, except that the peano postulates do not hold for a countable set. --[[User:Rdm|Rdm]] 20:19, 13 May 2012 (UTC)
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