#147 baaaaabbaa=aaaa

Original presentation

\( \left\langle a, b \;\middle|\; b a^{5} b^{2} a^{2} = a^{4} \right\rangle \)

Modified presentation

\( \left\langle a, b, c, d \;\middle|\; b c^{2} a b^{2} c = c^{2},\; c = a^{2},\; d = a^{2} b^{2} \right\rangle \)

Complete rewriting system

Using recursive path order (RPOCmp) with \(a < d < b < c\):

\( \begin{aligned} c &\rightarrow a^{2} \\ a^{2} b^{2} &\rightarrow d \\ b a^{3} d a^{2} &\rightarrow a^{4} \\ a^{2} b a^{4} &\rightarrow d a^{3} d a^{2} \\ b a^{3} d^{2} &\rightarrow a^{2} d \\ b a^{3} d a d &\rightarrow a^{3} d \\ a^{2} b a^{2} d &\rightarrow d a^{3} d^{2} \\ a^{2} b a^{3} d &\rightarrow d a^{3} d a d \\ d a^{3} d a d^{2} &\rightarrow a^{4} d \\ d a^{3} d a d a d &\rightarrow a^{5} d \\ d a^{3} d a d a^{2} &\rightarrow a^{6} \\ b a^{7} d &\rightarrow a^{5} d a d^{2} \\ b a^{8} d &\rightarrow a^{5} d a d a d \\ b a^{9} &\rightarrow a^{5} d a d a^{2} \\ d a^{3} d a^{5} d &\rightarrow a^{7} d a d^{2} \\ d a^{3} d a^{6} d &\rightarrow a^{7} d a d a d \\ d a^{3} d a^{7} &\rightarrow a^{7} d a d a^{2} \end{aligned} \)