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The cogrowth series for $\mathrm{BS}(N,N)$ is D-finite
Published 17 Sep 2013 in math.GR and math.CO | (1309.4184v3)
Abstract: We compute the cogrowth series for Baumslag-Solitar groups $\mathrm{BS}(N,N) = < a,b | aN b = b aN > $, which we show to be D-finite. It follows that their cogrowth rates are algebraic numbers.
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