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Displaying similar documents to “Large values of certain number-theoretic error terms”

Weighted integrability and L¹-convergence of multiple trigonometric series

Chang-Pao Chen (1994)

Studia Mathematica

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We prove that if c j k 0 as max(|j|,|k|) → ∞, and | j | = 0 ± | k | = 0 ± θ ( | j | ) ϑ ( | k | ) | Δ 12 c j k | < , then f(x,y)ϕ(x)ψ(y) ∈ L¹(T²) and T ² | s m n ( x , y ) - f ( x , y ) | · | ϕ ( x ) ψ ( y ) | d x d y 0 as min(m,n) → ∞, where f(x,y) is the limiting function of the rectangular partial sums s m n ( x , y ) , (ϕ,θ) and (ψ,ϑ) are pairs of type I. A generalization of this result concerning L¹-convergence is also established. Extensions of these results to double series of orthogonal functions are also considered. These results can be extended to n-dimensional case. The aforementioned results generalize work of Balashov [1],...