实Grassmann流形上的道路空间

Ｇ（ｎ，ｍ）表示Ｒ￣ｎ＋ｍ中全体ｎ维子空间所构成的实Ｇｒａｓｓｍａｎｎ流形。本文首先找到ｐ，ｑ∈Ｇ（ｎ，ｍ）沿任何测地线均不共轭的充要条件，因此连接这样两点的测地线有可数条。通过计算得到编号为（ｋ＿１，ｋ＿２，…，ｋ＿ｎ）的测地线指标λ（ｋ＿１，ｋ＿２…，ｋ＿ｎ）．最后根据Ｍｏｒｓｅ基本定理得到：设ｐ，ｑ是Ｇ（ｎ，ｍ），上沿任何测地线均不共轭的两点，则连接ｐ，ｑ的分段光滑道路空间同伦于一可数ＣＷ－复形，该复形中的胞腔可编号为（ｋ＿１，ｋ＿２，…，ｋ＿ｎ），ｋ＿ｉ为整数，且编号为（ｋ＿１，ｋ＿２，…，ｋ＿ｎ的胞腔的维数为λ（ｋ＿１，ｋ＿２…，ｋ＿ｎ）。     

不等式（2十a_1）·（2十a_2）…（2十a_n）≥3~n的推广

不等式（２十ａ＿１）·（２十ａ＿２）…（２十ａ＿ｎ）≥３￣ｎ的推广０６３６０２河北乐亭县新寨中学于永平有这样一道数学竞赛题：已知。１，。２，”””，。。是ｎ个正数，满足。１。２…ｑ＝１，求证（２十证明（当且仅当ａｌ—ａＺ＝…一ａ。＝ｌ时“一”号成立）...     

P_（q－1）的补图的色唯一性

用Ｐ＿ｎ表示有ｎ个顶点的路。本文证明了，如果ｑ＞５是素数，则Ｐ＿（ｑ－１）的补图是色唯一的。     

分数次算子在加权Herz型空间上的有界性

本文证明了具有某种尺寸条件的Ｌ＾ｑ１到Ｌ＾ｑ２有界的分数次次线性算子是Ｋｑ１＾ａ，ｐ（ω１，ω２＾ｑ１）（或Ｋｑ１＾ｑ，ｐ）（ω１，ω２＾ｑ１）到Ｋｑ２＾ａ，ｐ（ω１，ω２＾ｑ２）（或Ｋｑ２＾ａ，ｐ（ω１，ω２＾ｑ２）有界的以及ＨＫｑ１＾ａｐ（ω１，ω２＾ｑ１）（或ＨＫｑ１＾ａｐ（ω１，ω２＾ｑ１）到Ｋｑ２＾ａｐ（ω１，ω２＾ｑ２）（或Ｋｑ２＾ａｐ（ω１，ω２＾ｑ２）有界的。     

精细Besov空间

本文将Ｂｅｓｏｖ空间Ｂ＿Ｐ～Ｓ，ｑ推广为精细Ｂｅｓｏｖ空间ＲＢ＿Ｐ～ａ，ｑ，其中ｓ∈Ｒ，而ａ∈Ｒ～（ｋ＋１），ｋ为非负整数．给出了精细Ｂｅｓｏｖ空间的等价拟范数和嵌入定理．同时证明了在Ｂ＿Ｐ～Ｓ，ｑ和 ＵＢ＿ｐ～ｔ，ｑ之间还存在无穷多个精细Ｂｅｓｏｖ空间作为真子空间．     

关于三角形区域的Heilbronn数

设Ｋ是一个具有面积｜Ｋ｜的平面凸体。用（ｒ＿１ｒ＿２ｒ＿３）表示三角形ｒ＿１ｒ＿２ｒ＿３的面积，并令然后将Ｋ中ｎ个点的Ｈｅｉｌｂｒｏｎｎ数定义为对于三角形区域Δ，我们证明了     

关于Hunt－Yorke猜想的证明

考虑具有ｎ个变时滞的泛函微分方程其中ｑ＿ｉ（ｔ），Ｔ＿ｉ（ｔ）∈Ｃ（［０，＋∞），Ｒ￣＋），ｉ＝１，２，…，ｎ。本文证明了Ｈｕｎｔ－Ｙｏｒｋｅ猜想；同时还得到了在Ｋｗｏｎｇ－Ｐａｔｕｌａ意义下泛函微分方程强振动的充分条件。     

`CH~2中齐性曲面的分类(英文)

ＣＨ~２中的曲面 Ｍ称为（局部）齐性的，如果对任何一对点 ｐ，ｑ，存在变换。 σ　Ｕ（１，２）把含ｐ的一个邻域变为含ｑ的邻域，且把ｑ变为ｑ．本文给出ＣＨ２中齐性曲面的完全分类．     

数列（p_1／（n＋p_2））~（q_1n＋q_2）单调性

数列（ｐ_１／（ｎ＋ｐ_２））~（ｑ_１ｎ＋ｑ_２）单调性梁长林（华东地质学院）我们可以求出，极限，其中ｐ１，ｐ２，ｑ１，ｑ２为常数，下面讨论ｘｎ的单调性，因为ｘｎ与Ｉｎｘｎ有相同的单调性，所以考虑函数单调性设ｘ充分大，当Ｐ１〔２ｑ２—２ｐ２ｑ１—Ｐ１ｑ?..     

等比数列前n项和公式的七种推导方法

［题目］　在等比数列｛ａｎ｝中,已知首项ａ１和公比ｑ,求前ｎ项和Ｓｎ．［方法１］——先让学生演算Ｓ１,Ｓ２,Ｓ３,Ｓ４,然后启发学生猜想结论,让学生在探索过程中发现公式,培养学生的探索精神．当ｑ≠１时,Ｓ１＝ａ１＝ａ１（１－ｑ）１－ｑＳ２＝ａ１＋ａ１ｑ＝ａ１（１－ｑ）１－ｑ（１＋ｑ）＝ａ１（１－ｑ２）１－ｑＳ３＝ａ１＋ａ１ｑ＋ａ１ｑ２＝ａ１（１－ｑ２）１－ｑ＋ａ１ｑ２（１－ｑ）１－ｑ＝ａ１（１－ｑ３）１－ｑＳ４＝ａ１＋ａ１ｑ＋ａ１ｑ２＋ａ１ｑ３＝ａ１（１－ｑ３）１－ｑ＋ａ１ｑ３（１－ｑ）１－ｑ＝…     

A REPRESENTATION FORMULA RELATED TO SCHR(O)DINGER OPERATORS

Schr(o)dinger operator is a central subject in the mathematical study of quantum mechanics.Consider the Schrodinger operator H = -△ V on R, where △ = d2/dx2 and the potential function V is real valued. In Fourier analysis, it is well-known that a square integrable function admits an expansion with exponentials as eigenfunctions of -△. A natural conjecture is that an L2 function admits a similar expansion in terms of "eigenfunctions" of H, a perturbation of the Laplacian (see [7], Ch. Ⅺ and the notes), under certain condition on V.     

On a class of self-similar processes with stationary increments in higher order Wiener chaoses

We study a class of self-similar processes with stationary increments belonging to higher order Wiener chaoses which are similar to Hermite processes. We obtain an almost sure wavelet-like expansion of these processes. This allows us to compute the pointwise and local Hölder regularity of sample paths and to analyse their behaviour at infinity. We also provide some results on the Hausdorff dimension of the range and graphs of multidimensional anisotropic self-similar processes with stationary increments defined by multiple Wiener–Itô integrals.     

On a class of Riemann surfaces

It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.     

CONTENTS OF VOLUME 30

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Instructions for contributions

正Applied Mathematics-A Journal of Chinese Universities,Series B(Appl.Math.J.Chinese Univ.,Ser.B)is a comprehensive applied mathematics journal jointly sponsored by Zhejiang University,China Society for Industrial and Applied Mathematics,and Springer-Verlag.It is a quarterly journal with     

Journal of Mathematical Research with Applications Guide for Authors

正Journal overview:Journal of Mathematical Research with Applications(JMRA),formerly Journal of Mathematical Research and Exposition(JMRE)created in 1981,one of the transactions of China Society for Industrial and Applied Mathematics,is a home for original research papers of the highest quality in all areas of mathematics with applications.The target audience comprises:pure and applied mathematicians,graduate students in broad fields of sciences and technology,scientists and engineers interested in mathematics.     

Staircase transportation problems with superadditive rewards and cumulative capacities

A cumulative-capacitated transportation problem is studied. The supply nodes and demand nodes are each chains. Shipments from a supply node to a demand node are possible only if the pair lies in a sublattice, or equivalently, in a staircase disjoint union of rectangles, of the product of the two chains. There are (lattice) superadditive upper bounds on the cumulative flows in all leading subrectangles of each rectangle. It is shown that there is a greatest cumulative flow formed by the natural generalization of the South-West Corner Rule that respects cumulative-flow capacities; it has maximum reward when the rewards are (lattice) superadditive; it is integer if the supplies, demands and capacities are integer; and it can be calculated myopically in linear time. The result is specialized to earlier work of Hoeffding (1940), Fréchet (1951), Lorentz (1953), Hoffman (1963) and Barnes and Hoffman (1985). Applications are given to extreme constrained bivariate distributions, optimal distribution with limited one-way product substitution and, generalizing results of Derman and Klein (1958), optimal sales with age-dependent rewards and capacities.To our friend, Philip Wolfe, with admiration and affection, on the occasion of his 65th birthday.Research was supported respectively by the IBM T.J. Watson and IBM Almaden Research Centers and is a minor revision of the IBM Research Report [6].