TY - JOUR T1 - Copresented Dimension of Modules TT - JF - IJMSI JO - IJMSI VL - 14 IS - 2 UR - http://ijmsi.ir/article-1-1036-en.html Y1 - 2019 SP - 139 EP - 151 KW - Coherent ring‎ KW - ‎Copresented‎ KW - ‎Dimension‎ KW - ‎Projective module. N2 - In this paper, a new homological dimension of modules, copresented dimension, is defined. We study some basic properties of this homological dimension. Some ring extensions are considered, too. For instance, we prove that if $Sgeq R$ is a finite normalizing extension and $S_R$ is a projective module, then for each right $S$-module $M_S$, the copresented dimension of $M_S$ does not exceed the copresented dimension of $Hom_{R}(S,M)$. M3 ER -