On σσ-conservative and boundedly σσ-conservative four-dimensional matrices

Recently, Mursaleen and Mohiuddine [M. Mursaleen, S.A. Mohiuddine, Regularly σσ-conservative and σσ-coercive four-dimensional matrices, Comput. Math. Appl. 56 (2008) 1580–1586] defined and characterized the regularly σσ-conservative four-dimensional matrices by using the concept of regular convergence (rr-convergence) of double sequences x=(xjk)x=(xjk). In this paper, we characterize four-dimensional σσ-conservative and boundedly σσ-conservative matrices corresponding to the concept of pp-convergence and boundedly pp-convergence of double sequences, respectively.