共查询到20条相似文献,搜索用时 50 毫秒
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该文研究了一类复微分差分方程[f(z)f'(z)]n + fm(z + r) = 1,[f(z)f'(z)]n + [f(z + r)-f(z)]m = 1,[f(z) f'(z)] 2 + P2(z) f2(z + η) = Q(z)eα(z) 的超越整函数解,其中P(z), Q(z)为非零多项式,α(z)为多项式,... 相似文献
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利用亚纯函数的Nevanlinna值分布理论, 我们主要研究了一类复微分-差分方程和一类复微分-差分方程组的有限级超越整函数解的存在形式, 得到两个有趣的结论. 将复微分(差分)方程的一些结论推广到复微分-差分方程(组)中. 相似文献
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两类复微分-差分方程组的整函数解 总被引:1,自引:0,他引:1
利用Nevanlinna值分布理论以及复差分和复微分理论,讨论了两类复微分-差分方程组的有限级超越整函数解问题,得到了两个结果,并将涉及微分或差分方程的某些结果推广至复微分-差分方程组中. 相似文献
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介绍了利用微分从属关系定义的一类函数类v_k[p,A,B]和一类算子函数I_p~λ(μ,η)(z),在上述算子函数的基础上定义了两类积分算子函数F_(p,μ,η)~(n,λ)(z),G_(p,μ,η)~(n,λ)(z),利用微分从属和凸函数理论,得到了积分算子函数F_(p,μ,η)~(n,λ)(z),G_(p,μ,η)~(n,λ)(z)包含于函数类v_k[p,A,B]的条件,结论推广了部分已有的研究成果. 相似文献
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设f为一有穷级为ρ(f)的超越亚纯函数,μ和c作为一非零的常数.设n,m作为一正整数,且设s(z)作为一f的非零小函数.如果n≥m+4或者(m≥n+4),则差分多项式f~n(z)+μf~m(z+c)-s(z)在复平面上有无穷多个零点. 相似文献
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研究了整函数及其差分多项式分担有限复数集的唯一性,得到了如下结果:设S_m={1,ω,…,ω~(m-1)},其中ω=cos(2π/m)+i sin(2π/m),c为非零有限复数,n(>5),m(≥2)均为正整数.如果f(z),g(z)为有限级整函数,满足E(S_m,f(z)~n(f(z)-1)f(z+c))=E(S_m,g(z)~n(g(z)-1))g(z+c)),那么f(z)≡g(z). 相似文献
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本文考虑了非线性微分—差分方程fn(z)+q(z)eQ(z)f(k)(z+c)=p1eα1z+p2eα2z与fn(z)+q(z)eQ(z)△cf=p1eλz+p2e-λz解的增长性,其中n≥1,k≥1是两个整数,q(z)是非零多项式,Q(z)是非常数多项式.c,λ,α1,α2,p1,p2为非零常数,α1≠α2.特别地,... 相似文献
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John T. Conway 《Integral Transforms and Special Functions》2017,28(3):166-180
A method is given for deriving indefinite integrals involving squares and other products of functions which are solutions of second-order linear differential equations. Several variations of the method are presented, which applies directly to functions which obey homogeneous differential equations. However, functions which obey inhomogeneous equations can be incorporated into the products and examples are given of integrals involving products of Bessel functions combined with Lommel, Anger and Weber functions. Many new integrals are derived for a selection of special functions, including Bessel functions, associated Legendre functions, and elliptic integrals. A number of integrals of products of Gauss hypergeometric functions are also presented, which seem to be the first integrals of this type. All results presented have been numerically checked with Mathematica. 相似文献
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本文给出了由解析函数的实部或虚部求该解析函数的几个定理,再以例题说明其应用。这些方法及应用,解决了复变函数中这一问题的理论与计算,而且所给方法能广泛进行推广。 相似文献
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Generalized B-vex functions and generalized B-vex programming 总被引:21,自引:0,他引:21
C. R. Bector S. K. Suneja C. S. Lalitha 《Journal of Optimization Theory and Applications》1993,76(3):561-576
A class of functions called pseudo B-vex and quasi B-vex functions is introduced by relaxing the definitions of B-vex, pseudoconvex, and quasiconvex functions. Similarly, the class of B-invex, pseudo B-invex, and quasi B-invex functions is defined as a generalization of B-vex, pseudo B-vex, and quasi B-vex functions. The sufficient optimality conditions and duality results are obtained for a nonlinear programming problem involving B-vex and B-invex functions.The first author is thankful to the Natural Science and Engineering Research Council of Canada for financial support through Grant A-5319. The second author is grateful to the Faculty of Management, University of Manitoba for the financial support provided for her visit. The authors are thankful to Prof. R. N. Kaul, Department of Mathematics, Delhi University for his constructive criticism of the paper. 相似文献
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Dual feasible functions have been used to compute bounds and valid inequalities for combinatorial optimization problems. Here, we analyze the properties of some of the best functions proposed so far. Additionally, we provide new results for composed functions. These results will allow improving the computation of bounds and valid inequalities. 相似文献
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陈乔 《纯粹数学与应用数学》2013,(6):621-626
引入了严格r-预不变凸函数的概念,并证明了严格r-预不变凸函数与r-预不变凸函数有关的一个充分条件.同时,讨论得到了严格r-预不变凸性和半严格r-预不变凸性的等价条件. 相似文献
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A. Perotti 《Journal of Mathematical Analysis and Applications》2008,337(1):107-115
In this paper the Dirichlet problem for pluriholomorphic functions of two complex variables is investigated. The key point is the relation between pluriholomorphic functions and pluriharmonic functions. The link is constituted by the Fueter-regular functions of one quaternionic variable. Previous results about the boundary values of pluriharmonic functions and new results on L2 traces of regular functions are applied to obtain a characterization of the traces of pluriholomorphic functions. 相似文献
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In this paper, we introduce and investigate a new subclass of the function class Σ of bi-univalent functions of the Mocanu-convex type defined in the open unit disk, satisfy Ma and Minda subordination conditions. Furthermore, we find estimates on the Taylor-Maclaurin coefficients |a2| and |a3| for functions in the new subclass introduced here. Further Application of Hohlov operator to this class is obtained. Several(known or new) consequences of the results are also pointed out. 相似文献
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In this article, we define a subclass of meromorphic multivalent Sakaguchi type functions and obtain certain sufficient conditions for functions to be in this class. The main result presented here includes a number of consequences as its special cases. 相似文献
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The aim of this paper is two-fold. First, to give a direct proof for the already established result of Styer which states that a univalent geometrically starlike function is a univalent annular starlike function if is bounded. Second, to show that the boundedness condition of is necessary, thus disproving a conjecture of Styer.