Geodesic
On the Characterization of a Class of Four Dimensional Matrices and Steinhaus Type Theorems
Kragujevac Journal of Mathematics, Tome 40 (2016) no. 1, p. 35 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

In the present paper, we give the definitions of four dimensional conull and coregular matrices, and characterize the classes $(\mathcal{M}_{u}:\mathcal{C}_{\vartheta})$, where $\vartheta\in \{p,p0,f\}$ and $\mathcal{C}_{f}$ denotes the space of all almost convergent double sequences. Additionally, we give two Steinhaus type theorems related to the coercive/almost coercive four dimensional sequence to sequence matrix transformations.
Classification : 40C05
Keywords: Double sequence, double series, Pringsheim convergence, Steinhaus type theorems, matrix transformations 
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M. Yeşi; lkayagi; l; F. Başar. On the Characterization of a Class of Four Dimensional Matrices and Steinhaus Type Theorems. Kragujevac Journal of Mathematics, Tome 40 (2016) no. 1, p. 35 . http://geodesic.mathdoc.fr/item/KJM_2016_40_1_a2/