%0 Journal Article
%T The cogrowth series for $\mathrm{BS}(N,N)$ is D-finite
%A M. Elder
%A A. Rechnitzer
%A E. J. Janse van Rensburg
%A T. Wong
%J Mathematics
%D 2013
%I arXiv
%R 10.1142/S0218196714500106
%X We compute the cogrowth series for Baumslag-Solitar groups $\mathrm{BS}(N,N) = < a,b | a^N b = b a^N > $, which we show to be D-finite. It follows that their cogrowth rates are algebraic numbers.
%U http://arxiv.org/abs/1309.4184v3