RT Journal Article T1 Isoperimetric Inequalities in Riemann Surfaces and Graphs A1 Martínez Pérez, Álvaro A1 Rodríguez, José M. AB A celebrated theorem of Kanai states that quasi-isometries preserve isoperimetric inequalities between uniform Riemannian manifolds (with positive injectivity radius) and graphs. Our main result states that we can study the (Cheeger) isoperimetric inequality in a Riemann surface by using a graph related to it, even if the surface has injectivity radius zero (this graph is inspired in Kanai’s graph, but it is different from it). We also present an application relating Gromov boundary and isoperimetric inequality. PB Springer Nature Link SN 1050-6926 SN 1559-002X YR 2021 FD 2021 LK https://hdl.handle.net/20.500.14352/129071 UL https://hdl.handle.net/20.500.14352/129071 LA eng NO Martínez-Pérez, Á., Rodríguez, J.M. Isoperimetric Inequalities in Riemann Surfaces and Graphs. J Geom Anal.2021; 31: 3583–3607. NO Ministerio de Ciencia, Innovacion y Universidades NO Ministerio de Economa y Competititvidad NO Agencia Estatal de Investigacion NO Fondo Europeo de Desarrollo Regional (FEDER) DS Docta Complutense RD 1 abr 2026