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<int-e> learn 8/8/8/8/8/8/8/8 is an empty chess board in FEN notation.
author HackBot
date Sat, 30 Dec 2017 16:57:14 +0000
parents 561c5f0d6b8b
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The bicyclic monoid is the free monoid generated by two wheels of a bicycle, quotiented by the restriction that the bicycle itself is equal to the identity.