Guglielmetti, Rafael Jacquemet, Matthieu Kellerhals, Ruth 2016-04-08 For Coxeter groups acting non-cocompactly but with finite covolume on real hyperbolic space Hn, new methods are presented to distinguish them up to (wide) commensurability. We exploit these ideas and determine the commensurability classes of all hyperbolic Coxeter groups whose fundamental polyhedra are pyramids over a product of two simplices of positive dimensions. application/pdf https://folia.unifr.ch/global/documents/305030 https://folia.unifr.ch/documents/305030/files/kel_chc.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1007/s10711-016-0151-7 info:eu-repo/semantics/openAccess License undefined Geometriae Dedicata. - 2016, vol. 183, no. 1, p. 143–167 Commensurability Hyperbolic Coxeter group Coxeter pyramid Amalgamated free product Translational lattice Arithmetic group info:eu-repo/classification/udc/51 On commensurable hyperbolic Coxeter groups http://purl.org/coar/resource_type/c_6501