Abstract
We study the hyperbolicity of metric spaces in the Gromov sense. We deduce the hyperbolicity of a space from the hyperbolicity of its “building block components”. These results are valuable since they simplify notably the topology of the space and allow to obtain global results from local information. We also study how the punctures and the decomposition of a Riemann surface in Y-pieces and funnels affect the hyperbolicity of the surface.
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Rodríguez, J.M., Tourís, E. Gromov hyperbolicity through decomposition of metric spaces. Acta Mathematica Hungarica 103, 107–138 (2004). https://doi.org/10.1023/B:AMHU.0000028240.16521.9d
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DOI: https://doi.org/10.1023/B:AMHU.0000028240.16521.9d