Liouville–Weyl Derivatives of Double Trigonometric Series

Author(s):  
Ainur Jumabayeva ◽  
Boris Simonov
2008 ◽  
Vol 103 (2) ◽  
pp. 278
Author(s):  
Boris Simonov ◽  
Sergey Tikhonov

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.


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