APPROXIMATION FOR CONTINUOUS PERIODIC FUNCTION OF SEVERAL VARIABLES AND ITS CONJUGATE FUNCTION BY RIESZ MEANS ON SET OF TOTAL MEASURE |
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作者姓名: | 王昆扬 |
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作者单位: | Department of |
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摘 要: | §1 IntroductionLet Q=Q~k={(x_1,…,x_k)|-π≤x_j<π,j=1,…,k}.Suppose f∈L(Q). The Fourier series of f is denoted by
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