In this note we will show that an injection of the hyperbolic plane is Mobius if and only if for some 0 < theta < pi, f preserves triangles with an interior angle equal to theta.
机构:
Univ Adolfo Ibanez, Fac Ingn Ciencias, Padre Hurtado 750, Vina Del Mar, ChileUniv Adolfo Ibanez, Fac Ingn Ciencias, Padre Hurtado 750, Vina Del Mar, Chile
Hernandez, Rodrigo
Martin, Maria J.
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机构:
Univ Laguna, Dept Analisis Matemat, Astrofisico Francisco Sanchez S-N, San Cristobal la Laguna 38271, SpainUniv Adolfo Ibanez, Fac Ingn Ciencias, Padre Hurtado 750, Vina Del Mar, Chile