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<tswett> cat \'#!/bin/rm\' > bin/you-can-only-run-this-once; chmod +x you-can-only-run-this-once
author HackBot
date Wed, 04 May 2016 00:33:56 +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.