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Test maps and discrete groups in SL$(2,C)$. (English) Zbl 1178.30024
Author’s abstract: We present several discreteness criterions for a non-elementary group $G$ in SL$(2,C)$ by using a test map which need not be in $G$.

MSC:
 30C62 Quasiconformal mappings in the plane 30F40 Kleinian groups 20H10 Fuchsian groups and their generalizations (group theory)
Full Text:
References:
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