Asymptotics of the triangle groups and the associated spectra

M. Harmer


We consider the asymptotics of the $(p,q,r)$-triangle groups as one of the vertices goes to a cusp $ptoinfty$. We introduce new coordinates on the fundamental domain of the $(p,q,r)$-triangle group which in the limit approach the natural coordinates on the $(infty, q,r)$-triangle group and show that in these coordinates the fundamental solutions on the $(p,q,r)$-triangle group approach the fundamental solutions on the $(infty, q,r)$-triangle group. We use these coordinates to study how eigensolutions in the co-compact case accumulate onto the continuous spectrum in the non co-compact case.

triangle groups, hyperbolic geometry, spectra asymptotics

Math Review Classification

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