Shahrood University of Technology Journal of Algebraic Systems 2345-5128 2 2 2015 02 01 COHEN-MACAULAY HOMOLOGICAL DIMENSIONS WITH RESPECT TO AMALGAMATED DUPLICATION 125 135 361 10.22044/jas.2015.361 EN A. Esmaeelnezhad Faculty of Mathematical sciences and computer, University of Kharazmi, Tehran, Iran. Journal Article 2014 07 24 In this paper we use "ring changed'' Gorenstein homological dimensions to define Cohen-Macaulay injective, projective and flat dimensions. For doing this we use the amalgamated duplication of the base ring with semi-dualizing ideals. Among other results, we prove that finiteness of these new dimensions characterizes Cohen-Macaulay rings with dualizing ideals. https://jas.shahroodut.ac.ir/article_361_50a50dd113314eebf1bad604ed0e91b0.pdf