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Kleinian groups with unbounded limit sets

Published online by Cambridge University Press:  18 May 2009

A. F. Beardon
Affiliation:
St. Catharine's College, Cambridge
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The easiest way to construct automorphic functions is by means of the Poincaré series. If G is a Kleinian group with ∞ an ordinary point of G and if k ≧ 4, then

where Vz=(az+b)/(cz+d) and ad-bc=1. The convergence of this series is the crucial step in showing that the Poincaré series converges and is an automorphic form on G If ∞ is a limit point of ∞ the series in (1) may diverge and one can derive automorphic forms on ∞ from the Poincaré series of some conjugate group. These constructions are described in greater detail in /3, pp. 155–165].

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Type
Research Article
Copyright
Copyright © Glasgow Mathematical Journal Trust 1972