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Autor Ushijima, Akira |
Documentos disponibles escritos por este autor (1)
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texto impreso
In this paper we give necessary and sufficient conditions on three orientation-preserving hyperbolic isometries T1,T2,T3 so that for any point x ? H2 the orthogonal bisectors of the three segments with endpoints x, Ti(x) intersect. This is equiv[...]