RT Journal Article T1 Cheeger isoperimetric constant of Gromov hyperbolic manifolds and graphs A1 Rodríguez García, José Manuel A1 Martínez Pérez, Alvaro AB In this paper, we study the relationship of hyperbolicity and (Cheeger) isoperimetric inequality in the context of Riemannian manifolds and graphs. We characterize the hyperbolic manifolds and graphs (with bounded local geometry) verifying this isoperimetric inequality, in terms of their Gromov boundary. Furthermore, we characterize the trees with isoperimetric inequality (without any hypothesis). As an application of our results, we obtain the solvability of the Dirichlet problem at infinity for these Riemannian manifolds and graphs, and that the Martin boundary is homeomorphic to the Gromov boundary. PB World Scientific Publishing SN 0219-1997 YR 2018 FD 2018-08-01 LK https://hdl.handle.net/10016/32615 UL https://hdl.handle.net/10016/32615 LA eng NO Supported in part by a grant from Ministerio de Economíıa y Competitividad (MTM 2012-30719), Spain. Supported in part by two grants from Ministerio de Economíıa y Competitividad (MTM 2013-46374-P and MTM 2015- 69323-REDT), Spain, and a grant from CONACYT (FOMIX-CONACyT-UAGro 249818), México. DS e-Archivo RD 27 jul. 2024