Regularly sigma-conservative and sigma-coercive four dimensional matrices
The idea of sigma-conservative and sigma-coercive matrices for single sequences was introduced and studied by Schaefer in 1972. The theory of matrix transformations for double sequences has been recently developed by various authors. In this paper we study the concepts of regularly sigma-conservative and sigma-coercive matrices for double sequences. (c) 2008 Elsevier Ltd. All rights reserved.
double sequence p-convergence regular convergence almost convergence sigma-regular matrix regularly sigma-conservative matrix sigma-coercive matrix