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1.
Given a principal value convolution on the Heisenberg group H n = ? n × ?, we study the relation between its Laguerre expansion and the Fourier-Bessel expansion of its limit on ? n . We also calculate the Dirichlet kernel for the Laguerre expansion on the group H n .  相似文献   

2.
Given a principal value convolution on the Heisenberg group H n = ℂ n × ℝ, we study the relation between its Laguerre expansion and the Fourier-Bessel expansion of its limit on ℂ n . We also calculate the Dirichlet kernel for the Laguerre expansion on the group H n . Dedicated to Professor Sheng GONG on the occasion of his 75th birthday  相似文献   

3.
The weak type (1,1) estimate for special Hermite expansions on Cn is proved by using the Calderón-Zygmund decomposition. Then the multiplier theorem in Lp(1相似文献   

4.
1.IntroductionInthispaper,westudytheFredholmintegro-differentialequationbythewaveletmethod.Theapplicationsoftheequationinimagerestorationcouldbefoundin[101.ForthehistoryofnumericalmethodsfortheFredholmintegro-differentialequations,wereferto[4].FOllow...  相似文献   

5.
令L=?ΔHn+V是Heisenberg群Hn上Schr?dinger算子,其中非负位势V属于逆H?lder类.该文用分子刻画与L相关的Hardy型空间HL^p(H^n),进而得到了与L相关的Riesz变换的HL^p-有界性.  相似文献   

6.
In this article,the authors obtain an inequality of homogeneous expansion for f,where f is a quasi-convex mapping(including quasi-convex mapping of type A and quasi-convex mapping of type B)defined on the open unit polydisk in C n .Meanwhile,the authors also investigate its application.  相似文献   

7.
多元Bernstein—Sikkema算子的逼近性质   总被引:1,自引:1,他引:0  
本文对定义在单形上的Bernstein-Sikkema算子讨论其导数的收敛性质,同时出给出了高阶渐近展开式及Besov空间中的几个等价关系。  相似文献   

8.
Queue length and interdeparture distributions for GI/G/1 are obtained using the Laguerre function expansion of the waiting time distribution. The expansion of the steady state waiting time distribution is obtained here by solving a small set of linear equations in the Laguerre function expansion coefficients. Examples show the accuracy of the results and illustrate purely numerical techniques for obtaining the necessary expansions of the arrival and service distributions.  相似文献   

9.
SOME REMARKS ON HOLOMORPHIC FUNCTIONS AND TAYLOR SERIES IN Cn   总被引:1,自引:1,他引:0  
Some previous results on convergence of Taylor series in Cn [3] are improved by indicating outside the domain of convergence the points where the series diverges and simplifying some proofs. These results contain the Cauchy-Hadamard theorem in C. Some Cauchy integral formulas of a holomorphic function on a closed ball in Cn are constructed and the Taylor series expansion is deduced.  相似文献   

10.
Let Lp(Ω, Hn) indicate the Lp-space of the maps for Heisenberg group target. In this paper some new properties are obtained for the space Lp(Ω, Hn).  相似文献   

11.
令P=NAM是SU(n+1,1)的极小抛物子群,它可以看作是Heisenberg群Hn上的仿射自同构群.根据[1]中的可允许条件,我们给出了Hn上的带状小波.利用小波变换,我们得到了L2(Un+1,dμl(z,t,ρ))的另一个正交直和分解.进一步还给出了L2(P,dμl(z,t,ρ,u))的正交分解.  相似文献   

12.
This paper deals with the expansion of matrix functions in series of Laguerre matrix polynomials of a complex matrix parameter. A new asymptotic expression for positive and large x and n is obtained for this family of matrix polynomials that improves previous existing expressions. This expression is applied to improving the conditions imposed on the matrix function that are to be expanded in a series of non-hermitian Laguerre matrix polynomials, providing a new series expansion theorem that is more general than previous works. An application to solving linear differential systems without matrix exponentials is included.  相似文献   

13.
14.
On Connections Between Hankel, Laguerre and Heisenberg Multipliers   总被引:1,自引:0,他引:1  
We prove two results showing connections between Hankel multipliers,multipliers for a certain kind of Laguerre expansion and multipliersfor the Heisenberg sublaplacian. In their spirit they are closeto the well-known theorems of de Leeuw and Igari relating Lpmultipliers on R and its discrete subgroup Z. Also a conjectureis stated and its consequences are discussed.  相似文献   

15.
Suitably scaled Laguerre functions are an approximate identity for multiplicative convolution with test functions on the half line. As an application, we derive a precise connection between the Mikhlin-type expansion of a singular integral operator on a Heisenberg groupH n and its natural restriction toH n modulo the center. Research supported by NSF Grant DMS-9800605 and by NSERC Grant OGP0003017.  相似文献   

16.
In this paper, a class of biholomorphic mappings named quasi-convex mapping of order α in the unit ball of a complex Banach space is introduced. When the Banach space is confined to Cn, we obtain the relation between this class of mappings and the convex mappings.Furthermore, the growth and covering theorems of this class of mappings are given on the unit ball of a complex Banach space Ⅹ. Finally, we get the second order terms coefficient estimations of the homogeneous expansion of quasi-convex mapping of order α defined on the polydisc in Cn and on the unit ball in a complex Banach space, respectively.  相似文献   

17.
Summary A method for inverting the Laplace transform which uses an expansion into Laguerre polynomials is considered. By means of a recently established generalization of the Euler-Knopp transformation the rate of convergence of the series of Laguerre polynomials is accelerated. For computing the transformed series a recursive algorithm is given. Results of theoretical and practical nature make the usefulness of the new transformation evident.  相似文献   

18.
In this paper, a class of biholomorphic mappings named quasi-convex mapping of order a in the unit ball of a complex Banach space is introduced. When the Banach space is confined to Cn, we obtain the relation between this class of mappings and the convex mappings. Furthermore, the growth and covering theorems of this class of mappings are given on the unit ball of a complex Banach space X. Finally, we get the second order terms coefficient estimations of the homogeneous expansion of quasi-convex mapping of order a defined on the polydisc in Cn and on the unit ball in a complex Banach space, respectively.  相似文献   

19.
We consider the problem of finding a function defined on (0,∞) from a countable set of values of its Laplace transform. The problem is severely ill-posed. We shall use the expansion of the function in a series of Laguerre polynomials to convert the problem in an analytic interpolation problem. Then, using the coefficients of Lagrange polynomials we shall construct a stable approximation solution. Error estimate is given. Numerical results are produced.  相似文献   

20.
该文给出海森保群Hn上偏微分算子的显式基本解um,据此um,研究算子的可解性和亚椭圆性.  相似文献   

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