Schwartz函数的分解及其应用

本文主要研究Schwartz空间(记作f(R~n))上的函数及D(R~n)空间上的函数分解问题.本文用构造性的方法自适应地证明,任何一个Schwartz函数都可以分解为两个Schwartz函数的乘积.进一步,用类似的方法也证明了每一个D(R~n)函数都可以分解为与其支集完全相同的两个D(R~n)函数的乘积.作为这两空间上函数分解的应用,很容易得到f(R~n)=f(R~n)f(R~n)和D(R~n)=D(R~n)D(R~n).     

具有指定亏函数和指定亏量的素函数

设F(z)为亚纯函数,若F可表为 F(z)=f°g(z) (1) 其中g为整函数,f为亚纯函数(当f为有理函数时,g可为亚纯函数)。我们称(1)为F的一个分解。若F的任何形如(1)的分解都只能是f或g为线性函数,则称F为素的。如果F的任何形如(1)的分解都只能以g为多项式或f为有理函数的形式出现,则称F为拟素的。     

具有Borel例外值的亚纯函数的分解

引言 亚纯函数分解理论中,具有例外值的亚纯函数的分解,是一个值得关注的问题。1970年Goldstein证明了: 定理A 设F(z)是一有穷级的整函数,且δ(a,F)=1(a≠∞),则 F(z)是拟素的。     

薛定谔型算子在广义Morrey空间上的有界性

研究薛定谔型算子V~(β_1)▽(-△+V)~(-β_2).当位势函数V属于逆Holder函数类RH_s(sn/2)时,利用函数分解技巧,得到了这个算子在广义Morrey空间上的有界性质.这个结果丰富和改进了一些已有的一些结论.     

传递系统的伪分解函数和应用

令X为一个紧致度量空间,fX→X为(拓扑)传递的映射.通过对传递系统(X,f)在fn,n∈N的作用下的伪分解,先引入一个新的拓扑不变量"传递系统的PD函数(伪分解函数)".然后,讨论关于此不变量的一些重要性质.最后,把关于周期轨道的Sharkovskii定理推广到传递子系统上.     

Littlewood-Paley g_λ~*-函数交换子的Hardy型估计

研究了Littlewood-Paley g_λ~*-函数交换子的端点估计.利用函数分解技术,证明了当q1时g_λ~*-函数与LMO(R~n)(BMO(R~n)的一个子空间)函数生成的交换子[b,g_λ~*]是局部Hardy空间h1(R~n)到空间h~1(R~n)+L~q(R~n)的一个连续映射.推广了Coifman,Rochberg和Weiss关于交换子的经典结果.     

传递系统的伪分解函数和应用

令X为一个紧致度量空间,f:x→X为(拓扑)传递的映射.通过对传递系统(X,f)在fn,n∈N的作用下的伪分解,先引入一个新的拓扑不变量“传递系统的PD函数(伪分解函数)”. 然后,讨论关于此不变量的一些重要性质.最后,把关于周期轨道的Sharkovskii定理推广到传递子系统上.     

整数分解式的指数函数及其均值的计算

给出了整数标准分解式的数论函数β(n，p)和它的均值∑n≤Nβ(n，p)的定义，推出了整数n标准分解式的指数函数计算公式和均值∑n≤Nβ(n,p)的精确计算公式．     

一个数论函数和它的均值的计算

设 p是一个素数 ,n是任意正整数 ,函数α(n ,p)表示 p在n !标准分解式中的指数 ,本文给出了函数α(n ,p)的均值 ∑n相似文献   

Stirling数和Pascal矩阵函数

Call和Velleman(1993)引入了Pascal矩阵函数.Cheon和Kim(2001)应用Pascal矩阵函数分解第一类和第二类Stirling数.本文引入移位Stirling矩阵,并用Pascal矩阵对其分解.最后讨论引入广义Stirling数及其矩阵.He(2013)以及Hsu和Shiue(1998)对后者有一系列的讨论.本文中的矩阵等式反映了第一类、第二类和广义Stirling数以及二项式数之间的关系,而且形式简洁,有助于发现更多的性质.     

Geometry and Hardy spaces on spaces of homogeneous type in the sense of Coifman and Weiss

It is known that the space of homogeneous type introduced by Coifman and Weiss (1971) provides a very natural setting for establishing a theory of Hardy spaces. This paper concentrates on how the geometrical conditions of the space of homogeneous type play a crucial role in building a theory of Hardy spaces via the Littlewood-Paley functions.     

准凸映照齐次展开式的精细估计

本文给出C~n中单位多圆柱上和复Banach空间中单位球上的准凸映照(含A型准凸映照和B型准凸映照)f齐次展开式的精细估计,其中x=0是f(x)-x的k 1阶零点.同时,还讨论了复Banach空间单位球上准凸映照的构造,它为准凸映照齐次展开式的精细估计提供极值映照.     

Inhomogeneous Besov and Triebel-Lizorking spaces on spaces of homogeneous type

The authors introduce the inhomogeneous Besov space and the inhomogeneous Triebel-Lizorkin space on spaces of homogeneous type: and present their atom and molecule decompositions, their dual spaces and the complex interpolation theorems. They also establishe the relation between the homogoeneous Besov space and the inhomogeneous one, and between the homogeneous Triebel-Lizorkin space and the inhomogeneous one. Moreover, they establish T1 theorems for these inhomogeneous spaces when a≠0, and apply these T1 theorems to give new characterizations of these spaces.     

Inhomogeneous Besov and Triebel-Lizorking spaces on spaces of homogeneous type

The authors introduce the inhomogeneous Besov space and the inhomogeneous Triebel-Lizorkin space on spaces of homogeneous type: and present their atom and molecule decompositions, their dual spaces and the complex interpolation theorems. They also establishe the relation between the homogoeneous Besov space and the inhomogeneous one, and between the homogeneous Triebel-Lizorkin space and the inhomogeneous one. Moreover, they establish T1 theorems for these inhomogeneous spaces when a≠0, and apply these T1 theorems to give new characterizations of these spaces.     

Principal Gelfand pairs

Let X = G/K be a connected Riemannian homogeneous space of a real Lie group G. The homogeneous space X is called commutative or the pair (G, K) is called a Gelfand pair if the algebra of G-invariant differential operators on X is commutative. We prove an effective commutativity criterion and classify Gelfand pairs under two mild technical constraints. In particular, we obtain several new examples of commutative homogeneous spaces that are not of Heisenberg type.     

Local Tb Theorems and Hardy Inequalities

In the setting of spaces of homogeneous type, we give a direct proof of the local Tb theorem for singular integral operators. Motivated by questions of S. Hofmann, we extend it to the case when the integrability conditions are lower than 2, with an additional weak boundedness type hypothesis, which incorporates some Hardy type inequalities. The latter can be obtained from some geometric conditions on the homogeneous space. For example, we prove that the monotone geodesic property of Tessera suffices.     

齐型空间上的分数次积分算子

An equivalent definition of fractional integral on spaces of homogeneous type is given.The behavior of the fractional integral operator in Triebel-Lizorkin space is discussed.     

极大奇异积分算子的一个BLO估计

本文研究以(Ω(x)/|z|n))为核的极大齐次奇异积分算子在空间BMO(R~n)上的性质,其中Ω是一个零阶齐次函数且在单位球面上均值为零．可以证明：若Ω满足某种最小尺度条件和某种L~1-Dini型正则性条件,则此极大奇异积分算子是由BMO(R~n)到BLO(R~n)的有界算子．     

Singular Radon transforms along odd curves on the Heisenberg group

In this article we study the singular integral operators along the curve on the Heisenberg group. It is a variable coefficient extension of the singular integrals along the odd curves on the Euclidean space ℝ². The proof is based on the generalized Calderon-Zygmund theory on the space of homogeneous type.     

Affine homogeneity of indefinite real hypersurfaces in the space ℂ3

We develop a constructive approach to the problem of describing affinely homogeneous real hypersurfaces in 3-dimensional complex space having nondegenerate sign-indefinite Levi form. We construct the affine invariants of a nondegenerate indefinite hypersurface in terms of second-order jets of its defining function and introduce the notion of the affine canonical equation of this surface. Three main types of canonical equations are considered. For each of these types, we construct a family of Lie algebras related to affinely homogeneous surfaces of a particular type. As a result, a family (depending on two real parameters) of affinely different homogeneous submanifolds of 3-dimensional complex space is presented (as matrix algebras).