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Aug 23, 2012 at 3:58 vote accept Alexander Gruber
Aug 23, 2012 at 1:06 comment added Colin Reid The term I have usually seen is 'non-split cover'. A cover of a group $G$ is just a group that has a quotient isomorphic to $G$.
Aug 22, 2012 at 21:46 answer added Geoff Robinson timeline score: 3
Aug 22, 2012 at 17:45 history asked Alexander Gruber CC BY-SA 3.0