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1.
王学理 《数学学报》1995,38(1):51-66
设r为一个正实数,1<r<2,是一个H-群,υ:Γ→C是一个乘子系(定义见文[8]).本文在[8]的基础上讨论了Poincare级数的存在性.令P_(nr)(z,υ,A_j,Γ,k_j)=P_(nr)(z,0,υ,Γ,k_j).这里P_(nr)(z,s,A_j,Γ,k_j)如文[8]中定义.我们有:定理{P_(nr)(z,υ,A_j,Γ,k_j)}n+k_K>0是群Γ的,权为r的具有乘子系υ的全纯歧点型模形式,且它们张成歧点型模形式所成的空间.应用这个结果,我们证明了一些模形式的性质并推导出一个重要的恒等式.该恒等式在半整权模形式的Fourier系数估计中有极重要的地位.  相似文献   

2.
王学理 《数学学报》1994,37(6):767-782
设r为一个正实数,1<r<2,ГPSL2(R)是一个H-群,v:Г→C是一个乘子系(定义见ξ1)。在本文中我们定义了所谓非解析的Poincare级数Pnr(z,s,v,Aj,Г,kj)(ξ2)求出了它的Fourier展开式,应用Laplacian算子的谱及Selberg的Zeta函数,我们证明了Pnr(z,s,v,Aj,Г,kj)可以解析延拓到包含s=0的一半平面Re(s)>-δ中去,从而为我们三  相似文献   

3.
本文建立多线性算子TA1,A2,…Akf(x)=p.v∫RneiP(x,y)Ω(x-y)|x-y|n+M-kkj=1Rmj(Aj;x,y)f(y)dy,n2,的一个变形的sharp估计,其中P(x,y)是Rn×Rn上的实值多项式,Ω是零阶齐性函数且满足某种消失性条件,M=∑kj=1mj,Rmj(Aj;x,y)表示Aj在x点关于y的mj阶Taylor级数余项,对所有满足|α|=mj-1(j=1,2,…,k)的指标α,DαAj∈BMO(Rn).作为sharp估计的推论,得到了算子TA1,A2…Ak在Lp(1<p<∞)上的有界性.  相似文献   

4.
At-(v,k,λ)designisapairD=(P,L),wherePisasetofvpointsandLasetofksubsetsofPcaledblocks,suchthatanytpointsarecontainedinexactly...  相似文献   

5.
数学问题解答1998年5月号问题解答(解答由问题提供人给出)1131试证:一元多项式P(x)=xk-xk-1-1的复根z=reiθ一定满足r2k-2r2k-1cosθ+r2k-2-1=0.证明我们有|P(z)||zk-zk-1|-1=rk-1|z-...  相似文献   

6.
张学莲 《数学学报》1997,40(4):545-550
本文首先给出区域D的Poincare度量λ(z)的几个有关性质,然后推广Bers逼近定理,得到主要结果如下:设D是连通数为有穷的有界区域,记Aq(D)为D内满足‖ψ‖=∫D「λ(z)」^2-│ψ(z)‖dx∧dz^-│〈∞的解件函烽ψ之全体构成的Banach空间,Rq(D,T)(T包含(C-D))表示Aq(D)中极点在T的有理函数子空间,当T满足Bers逼近定理条件时,Rq(D,T)在Aq(D)k  相似文献   

7.
本文考虑了椭圆曲线Γ_D:X ̄3+Y ̄3=DZ ̄3.以LD(s)记Γ_D的HeckeL-级数.由L_D(s)的解析延拓我们将L_D(1)展成有限项之和,然后通过建立y ̄2=x ̄3-16的一个处处有好的约化的模型,证明了当p≡2或5(mod 9)时,L_(p ̄2)(1)≠0.这些结果是对Birch和Swinnerfon-Dyer猜想的支持。  相似文献   

8.
§1. ConditionsforGeneralEllipticComplexEquationsofFourthOrder  LetDbeaboundeddomain,weconsiderthegeneralellipticcomplexequationoffourthorderinthefollowingformwz2z2=F(z,w,wz,wz,…,wz3,wz4,wz3z,wz3z,wz4)+G(z,w,wz,wz,…,wz3),F=∑j+k=4(j,k)≠(2,2)Qj…  相似文献   

9.
在文[2]中,W.Kohnn对权为k和l的任意二个歧点型模形式f和g(其变换群是全模群SL_2(Z))定义了一类Dirichlet级数L_(f,g,n)(s),利用L_(f,g;n)(s)(为整数),可构造一个线性映射W_g:S_k→S_(k-l).并且讨论了L_(f,g;n)的一些特征值.在本文中,我们将[2]中的结果推广到Hilbert模形式的情况,并得到类似的结论.  相似文献   

10.
具有矩阵伸缩的双正交小波基   总被引:5,自引:0,他引:5  
李登峰 《数学学报》2000,43(5):907-920
在这篇文章里,我们研究了伸缩为矩阵的双正交小波基的构造问题,在适当条件下,我们得到了L~2(R~n)的小波框架或双正交小波基{sj,k}和{sj,k},其中sjk(x)=detAs(Ajx-k),sj,k(x)=detAj2s(Ajx-k)(j Z. k Z~n)及 A是一伸缩矩阵.  相似文献   

11.
研究了高阶线性微分方程f~(k)+A_(k-1)(z)f~(k-1)+…+A_1(z)f′+A_0(z)f=0的非零解f,及其一阶、二阶导数,f~(i)(i=1,2)的不动点性质,这里A_j(z)(j=0,1,…k-1)为亚纯函数,得到了若δ(∞,A_0)>0,且满足max{i(A1),i(A2),…,i(A_(k-1))}相似文献   

12.
We are dealing with orthogonal sequences with respect to forms verifying a second degreee equation, i.e. that its formal Stieltjes functionS(u)(z) satisfies a quadratic equation of the formB(z)S 2(u)(z)+C(z)S(u)(z)+D(z)=0, whereB, C, D are polynomials. Various algebraic properties are given, especially those concerning the quasi-orthogonality of associated sequences. A classification is outlined. Some examples are quoted. In particular, we give the representation of Tchebychev co-recursive forms for any complex value of the parameter.  相似文献   

13.
We are dealing with orthogonal sequences with respect to forms verifying a second degreee equation, i.e. that its formal Stieltjes functionS(u)(z) satisfies a quadratic equation of the formB(z)S 2(u)(z)+C(z)S(u)(z)+D(z)=0, whereB, C, D are polynomials. Various algebraic properties are given, especially those concerning the quasi-orthogonality of associated sequences. A classification is outlined. Some examples are quoted. In particular, we give the representation of Tchebychev co-recursive forms for any complex value of the parameter.  相似文献   

14.
关于代数体函数的重值   总被引:1,自引:0,他引:1  
何育赞 《数学学报》1979,22(6):733-742
<正> 关于亚纯函数或全纯函数的重值问题,首先为卡拉德峨多利(Caratheodory)、蒙德耳(Montel)所研究,并获得重要的结果,其后G.伐理隆(Valiron)、R.奈望利纳(Nevanlinna),以及较近熊庆来等就重值对值分布的影响进行了进一步的研究,获得新结的果.  相似文献   

15.
设Aj是整函数(j=0,1,…,k-2),其中i(A0)=p,i(Aj)<p,或σp(Aj)<σp(A0)(j=1,2,…,k-2),0<p<+∞.本文研究微分方程f(k)+Ak-2f(k-2)+…+A0f=0(k≥2)解的辐角分布并得出零点聚值线和Borel方向之间的关系.所得结论推广了先前的结果.  相似文献   

16.
In this paper we find a closed form of the solution for the factored inhomogeneous linear equation
Under the hypothesis A 1, A 2, …, A n are infinitesimal generators of mutually commuting strongly continuous semigroups of bounded linear operators on a Banach space X. Here we do not assume that A j s are distinct and we offer the computational method to get explicit solutions of certain partial differential equations.  相似文献   

17.
渐近非扩张型的自映象族的不动点与几乎轨道的渐近行为   总被引:4,自引:0,他引:4  
曾六川 《数学学报》2001,44(4):581-594
设C是一致凸Banach空间E的非空闭凸子集,Г={Tt:t ∈ S}是C上渐进非扩张型的自映象族,使得对每个t∈S,Tt:C→C连续,其中,S是有单位元的交换的拓扑半群.又设{u(t):t∈S}是Г的几乎轨道.本文证明了,若Г在{u(t):t∈ S}关于C的渐近中心c∈C处渐近正则,则下列叙述等价:(i)Tt,t∈S的所有公共不动点之集F(Г)非空;(ii){u(t):t∈S}局部有界;(iii)limt||Ttc-c||=0;(iv) c∈ F(Г).进一步,运用该结果,本文建立了渐近非扩张族的几乎轨道的渐近行为方面的结果.  相似文献   

18.
The Schur-Szegö composition of two polynomials \(f\left( z \right) = \sum\nolimits_{j = 0}^n {{A_j}{z^j}} \) and \(g\left( z \right) = \sum\nolimits_{j = 0}^n {{B_j}{z^j}} \), both of degree n, is defined by \(f * g\left( z \right) = \sum\nolimits_{j = 0}^n {{A_j}{B_j}{{\left( {\begin{array}{*{20}{c}}n \\ j \end{array}} \right)}^{ - 1}}{z^j}} \). In this paper, we estimate the minimum and the maximum of the modulus of f * g(z) on z = 1 and thereby obtain results analogues to Bernstein type inequalities for polynomials.  相似文献   

19.
A class of nonlinear second-order equations of divergent form is distinguished, whose solutions have properties recalling the properties of solutions of ordinary elliptic equations. In the linear case these are equations of the form $$\sum\nolimits_{j = 1}^k \lambda _j (x)A_j^2 u + \sum\nolimits_{j = 1}^k {\mu _j (x)A_j u + c(x)u + f(x) = 0,} $$ where the \(A_j = \sum\nolimits_{\alpha = 1}^n {\alpha _j^\alpha (x)\frac{\partial }{{\partial x^\alpha }}(1 \leqslant j \leqslant k)} \) are linearly independent first-order differential operators whose Lie algebra is of rank n, 2 ? k ? n, and theλj(x) ? 0 are functions which can become0 zero or increase in a definite way. Harnack's inequality is proved for nonnegative solutions of these equations.  相似文献   

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