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1.
设f(x)是以g2n(n≥1)的h进制位数码为系数的幂级数所定义的函数,其中g,ha1,a2……都是正整数,g,h≥2。本文研究了f(x)的无理性及其函数值的超越性。  相似文献   

2.
本文研究了亚纯函数与其导函数具有两个公共值集时的性质,得到了几个有趣的结果,是对亚纯函数与其导函数具有两个公共值时的性质的补充。设f是一非常数亚纯函数,n(≥2)是一个正整数,a,b是两个有穷复数且a^n≠b^n,a≠0,b≠0;ω=exp(2πih)。如果f和f′的集合S1={a,aω,…,aω^n-1},S2={b,bω,…,bω^n-1}为两个IM公共集值,则f≡tf′,其中t^n=1。  相似文献   

3.
独立数和最小度与f—因子   总被引:1,自引:0,他引:1  
对图存在f-因子涉及到独立数和最小度条件进行了研究,得到了下列结果:设a,b为整数且h≥a1,b≥2,G是一个有n个顶点的连通图且n≥(a+b)^2/a,f(x)是定义在V(G)上的非负整数函数,满足Σx∈VG)f(x)是偶数且α≤f(x)≤b。  相似文献   

4.
本文讨论复合数论函数sφ(n)=s(φ(n))的性质。这里s(n)是因数和函数,φ(n)是欧拉函数。证明了(pi是不同的奇素数,k=1,2,3),并猜想上述不等式对任何整数k≥1都成立。如果此猜想正确,则sφ(n)≥n对任何奇数n都成立。本文还求得数论方程sφ(n)=n的5个奇数解:F0,F0F1,F0F1F2,F0F1F2F3,F0F1F2F3F4(Fi是前5个费马素数)和2个偶数解:22μ3,23μ2μ5(μ2=3,μ3=7,μ5=31是前3个默森素数)。  相似文献   

5.
利用Euler函数给出了s元线性不定方程a1x1+a2x2+…+assx=n的全体整数解公式,它是系数a1,a2,…,as及自由项n的显式函数。  相似文献   

6.
二面体群D2^n的自同构群及其全形   总被引:2,自引:0,他引:2  
讨论了一类2^n阶群-二面体群D2^n=〈a,b│a^2n-1=b^2=1,bab^-1=a^-1)(n≥3)的自同构群A(D2^n)的置换表示,给出了A(D2^n)与H(D2^n)的构造。  相似文献   

7.
亚纯函数族结合微分多项式及重值的正规性   总被引:1,自引:0,他引:1  
研究了区域D内一亚纯函数族(f(z)),k为一正整数,ψ(z),a1(z),…,a1(z)为D内全纯函数,其中ψ(z)≠0,当族(f(z))中每个函数f(z)在D内满足,f(z)的零点的重级均≥m,f+a1(z)f+…+ak(z)f(z)-ψ(z)的零点的重级均≥n,且3(k+2)/n+4(k+1)n〈1时,族f(z)在K内正规。  相似文献   

8.
G=(X,Y;E)为二侵略产,其中|X|=|Y|=n,证明了:若n≥(a+b)^2/b-(a+b)/b且δ(G)≥an/(a+b),或δ(G)〉a+b+n-2√bn+1,则G有「a,b」-因子,并且将说明,条件δ(G)≥a/(a+b)n为最好的;在当b〈n≤4b且√bn+a为整数时,δ(G)〉a+b+n-2√bn+a也是最好的。  相似文献   

9.
讨论了交换2-群的自同构群,得到以下结论:4阶初等交换2-群G的自同构群AutG与S3同构,8阶〖1,2〗型交换2-群的自同构群为8附二面体群,2^n+1附(n≥3)〖1,n〗型交换2-群的自同构群为AutG=(a、,a2,b,c|a1^2n-2=a2^2=b^2=c^2=〖a1,a2〗=〖b2,b〗=〖a1,c〗=」a2,c〖=1,〗b,c〖=a1^2n-3〗。  相似文献   

10.
B值鞅差阵列强大数定律的收敛速度   总被引:2,自引:1,他引:2  
设B是p阶一致光滑空间,1〈p≤2,X={Xnk,Fnk,1≤k≤n,n≥1}是B值鞅差阵列且对非负实值随机为量Y尾概率一致有界,若存在α≥1,δ〉0,α〈p+δ(p-1),使(Y〉x)-1/x^a+δ(x→∞),则对任意的ε〉0,都有^∞∑n=1 n^a-2P(‖Snn/n‖≥ε)〈∞。其中Snn=^n∑K=1 Xnk(n≥1)。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

15.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

16.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

17.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

18.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

19.
Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of  相似文献   

20.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

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