【摘要】 将Stein[On the functions of Littlewood-Paley,Lusin,and Marcinkiewicz,Trans.Amer.Math.Soc.,1958,88:430-466]中的玛欣凯维奇函数的逆向不等式推广到一般情形.主要结果是对于n-维欧几里得空间k-阶球面调和函数空间的任意一基底,得到玛欣凯维奇函数的一般性的逆向不等式,即存在不依赖于函数f正常数C_p,使得||f||_p≤C_pΣ_j=1^N=1||μ_j（f）||_p,其中{μ_j（f）}_j=1^N是f的由这些球面调和函数生成的玛欣凯维奇函数.此外,对于任意的n-变元的k-阶调和多项式Q（x）以及泊松核P_t（x）,有Q（D）P_t（x）=C_n k（tQ（x））/(（|x|）²+t^2n+2k+1/2).更多还原

【Abstract】 We generalize the inverse inequality of Marcinkiewicz function in Stein[On the functions of Littlewood-Paley,Lusin,and Marcinkiewicz,Trans.Amer.Math.Soc,1958,88:430-466]to general cases.The main result of this paper is that,for any basis of spherical harmonic functions of order k in n-dimensional Euclidean space,we obtain the general inverse inequalities for Marcinkiewicz function,i.e.there exist a constant C_p does not depend on / such that ||f||_p≤C_p Σ_j=1^N=1 ||μ_j（f）||_p,where{μ_j（f）}_j=1^N are the Marcinkiewicz functions of / generated by these spherical harmonic functions.Moreover,for any n-variable homogeneous harmonic polynomial Q（x） of order k,and the Poisson kernel P_t（x）,we have Q（D）P_t（x） = C_n k（tQ（x））/(（|x|）²+t^2n+2k+1/2).更多还原