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<oerjan> ` sed -i \'s/ \\+/ /g;s/ $//\' wisdom/{if,o,rhenium,semmelweis}
author HackBot
date Thu, 30 Jun 2016 23:38:32 +0000
parents ca4257b9b1e7
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A free structure is one that has no nontrivial identities, except algebraist phrase that in a much fancier way with morphisms.