Abstract
Denote by\(\hat f\) the (complex) Fourier transform of a functionf which belongs toL 1(R 2). We shall assume thatf is odd inx andy, orf is even inx and odd iny, orf is odd inx and even iny. Among others, we prove that iff ∈L 1(R 2) and (x, y)=(0,0) is a strong Lebesgue point off, then\(\left| t \right|\left| v \right|\hat f(t,v)\) tends to 0 as |t|, |v|→∞ in the sense (C;α,β) for allα,β>1.
Abstract
Пустя\(\hat f\) обоэначает (комплексное) преобраэование Фуряе функцииf ∈L 1(R 2). Предполагается, что функцияf является нечетнои поx иy, или четнои по х и нечетнои по у, или нечетнои поx и четнои поy. Помимо других реэулятатов мы докаэываем, что еслиf ∈L 1(R 2) и точка (0,0) является дляf точкои Лебега в силяном смысле, то\(\left| t \right|\left| v \right|\hat f(t,v)\) суммируется к нулу методом (C; α, β) для всех α, β>1 при |t|, |v| → ∞.
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This research was partially supported by the Hungarian National Foundation for Scientific Research under Grant # T 016 393.
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Bagota, M., Багота, М. On the order of magnitude of double fourier transforms. II. Anal Math 25, 3–14 (1999). https://doi.org/10.1007/BF02908423
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DOI: https://doi.org/10.1007/BF02908423