Substructuring preconditioners for h − p Mortar FEM Silvia Bertoluzza, Micol Pennacchio, Christophe Prud’homme and Abdoulaye Samake ESAIM: M2AN, 50 4 (2016) 1057-1082 Published online: 27 June 2016 DOI: 10.1051/m2an/2015065