具奇系数发展型p-Laplace不等方程整体解的不存在性

考虑两类带奇性系数发展型p-Laplace不等方程整体非负解的不存在性,也即要证明某些拟线性抛物型方程的非线性Liouville定理．通过先验估计,证明了整体解在某个带参数的函数空间中的不存在性．当只考虑连续整体解时,可选取不带参数的函数空间并证明整体解在其中的不存在性．     

具奇系数发展型p-Laplace不等方程整体解的不存在性

考虑两类带奇性系数发展型p-Laplace不等方程整体非负解的不存在性,也即要证明某些拟线性抛物型方程的非线性Liouville定理.通过先验估计,证明了整体解在某个带参数的函数空间中的不存在性.当只考虑连续整体解时,可选取不带参数的函数空间并证明整体解在其中的不存在性.     

非一致椭圆型方程的广义Green函数

该文我们证明了一类齐次线性非一致椭圆型方程广义Ｇｒｅｅｎ函数的存在性和唯一性，并得到了广义Ｇｒｅｅｎ函数的一性性质，推广和发展了Ｇｒｕｔｅｒ，Ｍ．和Ｗｉｄｍａｎ，ｋ．ｏ［２］的相应结果，而且我们证明广义Ｇｒｅｅｎ函数唯一性的方法与［２］中的方法完全不同．     

广义Ginzburg-Landau型非线性高阶抛物方程的Caucky问题

本文证明了广义Ｇｉｎｚｂｕｒｇ－Ｌａｎｄａｕ型非线性高阶抛物方程的周期边值问题和Ｃａｎｃｈｙ问题广义解和古典解的整体存在性和正则性，并且还证明了解的唯一性和这些解的渐近性质．     

脉冲时滞抛物型方程解的振动准则

本文研究含脉冲的时滞抛物型方程解的振动性,在两类不同边界条件下得到了若干解的振动准则．     

一类脉冲中立型时滞抛物方程组的振动性

研究一类脉冲中立型时滞抛物方程组解的振动性,得到了该类方程组在两类不同边界条件下所有解振动的若干充分条件.     

半导体模型中退化漂移—扩散问题解的存在性

研究半导体物理中出现的漂移—扩散模型,这是一个关于带电粒子浓度n,p,静电位ψ的抛物—椭圆耦合方程组,并带有混合初边值条件.对初值在L2+(Ω)时弱解的存在性展开讨论,利用正则化方法和适当的函数变换,使抛物型方程的解具有正下界n,p≥ε>0,同时得到一系列先验估计.然后通过紧性引理和Schauder不动点定理,得到初值在L2+(Ω)时弱解的存在性.     

抛物型Monge-Ampère型方程的Cauchy-Neumann问题

本文研究了一类抛物型Monge-Ampère型方程的Cauchy-Neumann问题.通过构造辅助函数,利用函数在极大值点的性质及柯西不等式等方法对方程的解进行估计,得到了方程解的全局二阶梯度估计.接着利用抛物方程的一般理论,进一步得到在光滑条件下,解的长时间存在性,推广了抛物型Monge-Ampère方程的结果.     

双调和型抛物方程的Schauder估计

该文给出了双调和型抛物方程初值问题解的Schauder估计,并且在适当的空间中证明了解的存在性与惟一性．类似于二阶情形,首先通过Fourier变换得到一个形式解,然后再利用位势理论和逼近方法得到解的正则性、唯一性及存在性．该方法简单而易懂．     

具奇异位势的半线性抛物方程Cauchy问题的奇异解

本文研究奇异半线性抛物方程ut-Δu+V1(x)u=V2(x)up,x∈Rn＼{0},t＞0的Cauchy问题解的存在性.这里,V1(x),V2(x)可以在原点具有奇性.利用Kato类函数和Green tight函数及不动点定理证明了问题存在正的奇异解,它在原点具有奇性.     

Fourier transforms and bent functions on finite groups

Let G be a finite nonabelian group. Bent functions on G are defined by the Fourier transforms at irreducible representations of G. We introduce a dual basis \({\widehat{G}}\), consisting of functions on G determined by its unitary irreducible representations, that will play a role similar to the dual group of a finite abelian group. Then we define the Fourier transforms as functions on \({\widehat{G}}\), and obtain characterizations of a bent function by its Fourier transforms (as functions on \({\widehat{G}}\)). For a function f from G to another finite group, we define a dual function \({\widetilde{f}}\) on \({\widehat{G}}\), and characterize the nonlinearity of f by its dual function \({\widetilde{f}}\). Some known results are direct consequences. Constructions of bent functions and perfect nonlinear functions are also presented.     

Gelfer函数与Yamashita问题

Ｇｅｌｆｅｒ函数与Ｙａｍａｓｈｉｔａ问题邹中柱（湖南怀化师范专科学校，湖南怀化４１８００８）１９９１年７月１９日收到，１９９２年１１月２４日收到修改稿．若函数在单位圆盘中解析，且对于一切都有则称函数［２］，记其全体为Ｇ，并用Ｇ表示其单叶子类．显然，当...     

Bavrin’s Type Factorization of the Temljakov Operator for Holomorphic Functions in Circular Domains of $$\mathbb {C}^{n}$$

The paper concerns investigations of holomorphic functions of several complex variables with a factorization of their Temljakov transform. Firstly, there were considered some inclusions between the families \(\mathcal {C}_{\mathcal {G}},\mathcal {M}_{\mathcal {G}},\mathcal {N}_{\mathcal {G}},\mathcal {R}_{\mathcal {G}},\mathcal {V}_{\mathcal {G}}\) of such holomorphic functions on complete n-circular domain \(\mathcal {G}\) of \(\mathbb {C}^{n}\) in some papers of Bavrin, Fukui, Higuchi, Michiwaki. A motivation of our investigations is a condensation of the mentioned inclusions by some new families of Bavrin’s type. Hence we consider some families \(\mathcal {K}_{ \mathcal {G}}^{k},k\ge 2,\) of holomorphic functions f :  \(\mathcal {G}\rightarrow \mathbb {C},f(0)=1,\) defined also by a factorization of \( \mathcal {L}f\) onto factors from \(\mathcal {C}_{\mathcal {G}}\) and \(\mathcal {M} _{\mathcal {G}}.\) We present some interesting properties and extremal problems on \(\mathcal {K}_{\mathcal {G}}^{k}\).     

The Conditions for Some Linear Partial Differential Equations to Be Solvable in G

Using Bargmann's transformation and some basic results of theory of analytic functions with several complex variables, we have disscussed two classes of LPDOs in this paper. We prove that each operator of one class of them is surjective both from G to G and from L² to L², but not injective, and each operator of another class is injective from G to G but not surjective. And in the letter case, the necessary and suffcient conditions for the corresponding equations to be solvable in G are given.     

APPLICATION OF THE G CLASS OF FUNCTIONS IN THE PARABOLIC CLASS

§1　IntroductionIn[1],wehaveintroducedtheconceptoftheGclassoffunctionsintheparabolicclass,andhaveprovedtheHldercontinuityofthiskindoffunctions.Theintroductionoftheconceptcontributestotheproofoftheregularityandexistenceofthesolutionforthefirstboundaryvalueproblemofparabolicequationindivergenceform.Here,weconsidertheapplicationsoftheGclassoffunctionsintheparabolicclasstothefirstboundaryvalueproblemofparabolicequation.Asweknow,ithasreceivedextensivestudyforthefirstboundaryvalueproblemofthefoll…     

Topological properties of regular generalized function algebras

We investigate the topological density of various subalgebras of regular generalized functions in the Colombeau algebra $\mathcal{G }(\varOmega )$ of generalized functions with its natural (so-called sharp) topology.     

Bi-Poisson Structures and Integrability of Geodesic Flow on Homogeneous Spaces

Let G/K be a semisimple orbit of the adjoint representation of a real connected reductive Lie group G. Let K₁ be any closed subgroup of K containing the commutant of the identity component of K. We prove that the geodesic flow on the symplectic manifold T*(G/K₁), corresponding to a G-invariant pseudo-Riemannian metric on G/K₁ which is induced by a bi-invariant pseudo-Riemannian metric on G, is completely integrable in the class of real analytic functions, polynomial in momenta. To this end we study the Poisson geometry of the space of G-invariant functions on T*(G/K) using a one-parameter family of moment maps.