加权的Marcinkiewicz－Zygmund不等式

本文证明加Ａｐ权的Ｍａｒｃｉｎｋｉｅｗｉｃｚ－Ｚｙｇｍｕｎｄ不等式，并指出对权所加的Ａｐ条件是必要的，最后还把这些结果应用于Ｌａｇｒａｎｇｅ插值多项式加权平均逼近阶的估计。     

多线性分数次积分的双权弱型不等式

本文给出了双权函数的一个如型条件使得多线性分数次积分满足双权弱型（p，q）不等式．     

多线性分数次积分算子交换子的双权弱型不等式

多线性分数次积分算子定义为利用分数次Orlicz极大算子和sharp函数,得到了多线性分数次积分算子交换子的双权弱(p,p)型不等式成立的充分条件.     

Weighted Inequalities for Multilinear Potential Operators and their Commutators

We prove weighted strong inequalities for the multilinear potential operator T_f{cal T}_{phi} and its commutator, where the kernel ϕ satisfies certain growth condition. For these operators we also obtain Fefferman-Stein type inequalities and Coifman type estimates. Moreover we prove weighted weak type inequalities for the multilinear maximal operator M_j,L^Bmathcal{M}_{varphi,L^{B}} associated to an essentially nondecreasing function φ and to the Orlicz space L ^B for a given Young function B. This result allows us to obtain a weighted weak type inequality for the operator T_f{cal T}_{phi}.     

多线性向量值奇异积分极大算子的加权不等式

本文研究向量值奇异积分极大多线性交换子的性质,得到该算子的加权估计及加权弱型估计,作为该估计的推论可知算子T_(q,(?))~*在L~p(ω)上有界,其中ω∈A_p。当ω∈A_1时,满足加权L(logL)~(1/r)型估计。     

一类多线性奇异积分算子的加权估计

In this paper, weighted estimates with general weights are established for the multilinear singular integral operator defined by TAf(x) = p. v.RnΩ(x- y)|x- y|n+1 A(x)- A(y)- A(y)(x- y) f(y)dy,where Ω is homogeneous of degree zero, has vanishing moment of order one, and belongs to Lipγ(Sn-1) with γ∈(0, 1], A has derivatives of order one in BMO(Rn).     

Sharp Function Estimates and Weighted Norm Inequalities for Multilinear Singular Integral Operators

A sharp function estimate is established for multilinear singularintegral operators. As applications, some weighted norm inequalitiesare obtained for such operators. 2000 Mathematics Subject Classification42B20.     

On Marcinkiewicz-Zygmund laws

Marcinkiewicz-Zygmund laws with convergence rates are established here for a class of strictly stationary ergodic sequences.     

New Weighted Norm Inequalities for Certain Classes of Multilinear Operators on Morrey-type Spaces

Applying the new class of multiple weights A_p~θ, we establish some weighted norm inequalities for certain classes of multilinear operators in the Morrey-type spaces. In addition, the new multiple weighted norm inequalities for multilinear commutators of T with the new BMO functions BMO_θ are also obtained.     

The Marcinkiewicz-Zygmund inequality with derivatives

Let m≥1 and P be a polynomial of degree at most mn?1. Let dα, dβ be Jacobi distributions and x_kx be zeros of orthogonal polynomials with respect to dα. Then inequality of the type {fx100-1}, is considered.     

多重奇异积分的多线性交换子

引进了由多重奇异积分和BMO函数生成的多线性交换子,然后得到了此类算子从Lebesgue积空间到Lebesgue空间的有界性,最后也给出了此类算子的加权和向量值不等式.     

On Marcinkiewicz-Zygmund Type Inequalities for Irregular Knots in Lp-Spaces, 0 < p ≦ +∞

An equivalence of a discrete norm and a continuous norm of a trigonometric polynomial is proved for the case of irregular knots in L_p-spaces, where 0 < p ≦ +∞.     

Spherical Marcinkiewicz-Zygmund inequalities and positive quadrature

Geodetic and meteorological data, collected via satellites for example, are genuinely scattered and not confined to any special set of points. Even so, known quadrature formulas used in numerically computing integrals involving such data have had restrictions either on the sites (points) used or, more significantly, on the number of sites required. Here, for the unit sphere embedded in , we obtain quadrature formulas that are exact for spherical harmonics of a fixed order, have nonnegative weights, and are based on function values at scattered sites. To be exact, these formulas require only a number of sites comparable to the dimension of the space. As a part of the proof, we derive -Marcinkiewicz-Zygmund inequalities for such sites.

     

Multilinear localization operators

In this paper we introduce a notion of multilinear localization operators. By reinterpreting these operators as multilinear Kohn-Nirenberg pseudodifferential operators, we give sufficient conditions for their boundedness on products of modulation spaces. Moreover, we prove that these conditions are also necessary for the boundedness of the operators. Finally, as application, we construct various examples of bounded multilinear pseudodifferential operators.     

Multilinear enumerative techniques

When S is a finite set and G a finite group acting on S, we consider the problem of rejecting isomorphs in a G-stable subset of S. In previous work we developed a linear algebraic context for this problem by constructing the finite dimensional vector spaceF^s whereF is a field of characteristic zero. When S is a finite function space, or a finite direct product of finite function spacesF^s acquires a multilinear structure By various specializations ofG and S and by applications of results which have appeared elsewhere, identities of Sheehan, deBruijn and P61ya are obtained. Furthermore, these same techniques are applied to examples which do not have a clear resolution using the more common formulas     

Multilinear enumerative techniques

When S is a finite set and G a finite group acting on S, we consider the problem of rejecting isomorphs in a G-stable subset of S. In previous work we developed a linear algebraic context for this problem by constructing the finite dimensional vector spaceF ^s whereF is a field of characteristic zero. When S is a finite function space, or a finite direct product of finite function spacesF ^s acquires a multilinear structure By various specializations ofG and S and by applications of results which have appeared elsewhere, identities of Sheehan, deBruijn and P61ya are obtained. Furthermore, these same techniques are applied to examples which do not have a clear resolution using the more common formulas