The notion of regularity for two dimensional matrix transformations was presented by Silverman  and Toeplitz .
Also, in -, and  the four dimensional matrix transformation [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] was studied extensively by Robison and Hamilton.
Characterisations of classes of matrix transformations between sequence spaces constitute a wide, interesting and important field in both summability and operator theory.
The [beta]-duals play a much more important role than the continuous duals in the theory of sequence spaces and matrix transformations.
Matrix transformations of [lambda]-boundedness fields of normal matrix methods.
The matrix transformation y = Mx exists for each x 2 [m.
Specific topics include a survey of Kalton's work, twisted dualities in Banach space theory, complexity and homogeneity in Banach spaces, conditions for stochastic integrability in UMD Banach spaces, a new infinite game for Banach spaces with applications, greedy approximation in Banach spaces, Kolmogorov numbers of matrix transformations
, a general Baker super-stability criterion for the D'Alembert functional equation, aspects of probabilistic Littlewood-Paley theory, properties related to the Dauavet property, perturbations of ideal complements and asymptotically transitive Banach spaces.
Keywords: Time scales, function spaces, duals, matrix transformations.
In Section 4, we study infinite matrix transformations on special time scales as an application of the results in the earlier sections.
involving [chi] were characterized by Sridhar  and Sirajiudeen .
Also, in  -  and  the four dimensional matrix transformation
Turkmenoglu: Matrix transformation
between some classes of double sequences; Jour.