共查询到20条相似文献,搜索用时 78 毫秒
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本文讨论了数学模型:max{f(x)│f(x)=min(1≤j≤n)〔c1jx1j+c2jx2j〕,x∈D},其中D={x│x={xij},nΣ(j=1)xij=a,i=1,2,xij≥0且为整数},并给出了一个拟多项式算法。 相似文献
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应用矩阵A=(aij)∈Cn×n的弗罗伯尼范数AF和谱范数AS,研究厄米特矩阵的迹的性质,得到几个结论:Tr(AB)=∑ni=1λi∑nj=1tijμj(λi,μj分别为A,B的特征值,0≤tij≤1,且∑ni=1tij=1,j=1,2,…,n);Tr(AB)≤Tr(A)BS;Tr(AB)H(AB)]≤Tr(AHA)[max1≤i≤nλi]2(λi是B的特征值)等. 相似文献
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设D1、D2、m、x、y是适合D1〉1,D2〉1,2├D1D2,gcd(D1,D2)=gcd(x,y)=1的正整数,n是适合n├h的奇素数,其中h是虚二次域Q(√-2^mD1D2)的类数。本文主要证明了:方程D1x^2+2^mD2=y^n至多有5.10^16组例外解(D1,D2,x,y,m,n)而且这些解都满足了7≤n〈8.5.10^6以及y^n〈exp(exp(exp46))。 相似文献
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设F为有限序列族,对a=(a1,a2,…,an)∈F,ai为整数且0≤ai≤si(整数),记s(a)={j|1≤j≤n,aj>0},s(F)={s(a)|a∈F},及A{1,2,…,n}时W(A)=Пi∈Asi.称F为贪婪t-相交,如对任何a,b∈F,至少有t个ai,bi>0,且W(A)≥W(({1,2,…,n}-A)+B)对任何A∈S(F)及BA(|B|=t-1)成立.本文得到当s1>s2>…>sn时的最大贪婪t-相交有限序列族. 相似文献
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设f(z)是超越亚纯函数,n为任一非负整数,ε为任意正数,a^(i)r=(v=1,2,…,qi,i=0,1,…,n)均为有穷非零复数,满足min/1≤v1<v2≤qi|a^(i)v1-a^(i)v2|≥δ>0,i=0,1,…,n。若f(0)≠0,∞,П^ni=1f(i)(0)≠0,则对0<r<+∞有m(r,f)+m(r,1/f)+Σ^ui=0Σ^qir=1m(r,a^(i)v,f^(i)≤(2+ε 相似文献
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彭志刚 《纯粹数学与应用数学》1998,14(3):5-8
设G={f(z):f(z)在│z│〈1上解析,f(z)=z-Σn=2→∞ anz^n,an≥0,Σn=2→∞ nan≤1,Σn=3→∞n(n-1)an≤2a2}。本文找出了函数族G的极值点与支撑点。 相似文献
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设是一个整数,对任一0<α<n且(a,n)=1,显然存在唯一的整数0<α<n-1使得αα≡1(modn).本文的主要目的是研究差式|α-α|在算术级数中的分布性质,并给出一个有趣的渐近公式. 相似文献
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根据定理 1,2和 3;求任何一个方程 a~x-b~y=n,a~xb~y±a~z±b~w±1=0 或a~x±b~y±a~z±b~w=0(x,y,z,w∈≥0)的解都是很简单的,此处a,b是适合 2 ≤5 a,b≤50的互素的两个整数,n是适合1≤n≤80000的整数. 相似文献
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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. 相似文献
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ZHENG ShiJun 《分析论及其应用》2004,20(3)
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. 相似文献
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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. 相似文献
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《高校应用数学学报(英文版)》2014,29(4)
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 相似文献
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《数学研究及应用》2014,(6)
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. 相似文献
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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]. 相似文献
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