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added 3 characters in body

edited Jun 8, 2015 at 15:12

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I have to say that this article http://arxiv.org/abs/1506.00887 has at least one mistake

Lemma 3.5 Counterexample - take group G=sequences of integer numbers

l and m are right and left shift respectively

m*l=id, so Image(e)=G

answered Jun 8, 2015 at 15:05

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