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    Galois extension of CP-Graded ring extensions 

    El Fadil, L. (2006-07)

    In this paper, we investigate galois theory of CP-graded ring extensions. In particular, we generalize some galois results given in [1, 2] and, without restriction to nor graded fields nor torsion free of the grade groups, ...

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    Norm inequalities in multidimensional Lorentz spaces 

    Simonov, Boris V.; Tikhonov, Sergey Yu. (2007-06)

    In this paper we obtain necessary and sufficient conditions for double trigonometric series to belong to generalized Lorentz spaces, not symmetric in general. Estimates for the norms are given in terms of coefficients.