On the Gromov product and its generalization in partial metric spaces

RESUMO

The first aim of this article is to extend the notion of the Gromov product to the class of partial metric spaces. A relation between $\delta$-hyperbolicity of a partial metric space and $\delta$-hyperbolicity of metric spaces endowed with the metrics defined via that partial metric is also established. The second one is to analyze the Gromov product in the wide class of metric spaces in which metrics are defined via Chebyshev sets. Midpoint mappings in this class of spaces will be also examined.