因子链上的最大公因数幂矩阵与最小公倍数幂矩阵

设S={x1,…，xn}是由n个不同正整数组成的集合，ε∈Z^ ．本文研究了对ε∈Z^ 定义在任意因子链S上的幂矩阵(S)n^ε和[S]n^ε的奇异性及它们的行列式det(S)n^ε：与det[S]n^ε间的整除性．     

最大公因子封闭集上幂矩阵行列式的整除性

设S=x1,x2,...,xn是由n个不同的正整数组成的集合,并设整数a≥1.如果n阶矩阵的第i行j列元素是S中元素xi和xj的最大公因数的a次幂(xi,xj)a,则称该矩阵是定义在S上的a次幂GCD矩阵,用(Sa)表示.类似可定义幂LCM矩阵[Sa].作者证明了:若S是由n个不同的正整数组成的一个最大公因子封闭集,且a|b,如果n≤3,那么det[Sa]|det[Sb],det[Sa]|det[Sb];如果max{xi}xi∈S<12,那么det[Sa]|det[Sb],det[Sa]|det[Sb].     

最大公因数闭集上平方矩阵的行列式的整除性

设S={x1,…,xn}是由n个不同正整数组成的最大公因数闭集．得到的主要结果是：（1）如果n≤3，则det（S）n^2整除det[S]n^2；（2）如果max{xi si∈S}〈12，则det（S）n^2整除det[S]m^2；（3）当n=4时，存在最大公因数闭集．S，有det（S）n^2不整除det[S]n^2．     

p-级数的两个求和公式

借助函数fk（x）=π/2x^k（0≤x≤π）的余弦级数，给出了当p为偶数时p-级数∑∞n=1/n^p及∑∞n=（-1）^n-1/n^p的两个求和公式，从而解决了这一类p-级数的求和问题。     

Riemann可积的充要条件

设 f:[a,b]→R,P={x_i|a≤x_0相似文献   

与格点可视性相关的几个问题的结核

格点即二维空间中坐标为整数的点，设△n^2={(x,y):x,y∈Z，1≤x≤n，1≤y≤n}，对于△n^2中的两点P，Q，称P与Q相互可视是指P＝Q或在连续P与Q的线段上没有其他任何格点。本讨论了几个与格点可视性相关的问题，并给出了相应的结果。     

关于最大公因数闭集上平方矩阵的行列式整除性的注记

设S={x1，…，Xn}是由n个不同正整数组成的最大公因数闭集。在本文中我们的主要结果是：对max{xi}xi∈s 〈18中除去12∈S的最大型因子集是{2，3}的其余情形均有det（S）n^2｜det[s]n^2.     

关于多边形三角划分中的一个逼近问题

1970年Monksy证明了正方形不能划分为奇数个面积相等的三角形，此性质已被推广到中心对称的多边形以及其它特殊的多边形。本证明：对任意多边形K，存在平面多边形簇{Kn|n∈N}和{K'n|n∈N}使得{Kn|n∈N}∪{K'n|n∈N}中任何一个Kn或K'n都不能划分为奇数个面积相等的三角形并且linn→∞Kn=K=linn→∞K'n,A(Kn)≤A（K）≤A（K'n),linn→∞A（Kn)=A(K)=linn→∞A（K'n)。     

关于两两NQD阵列Jamison型加权和的收敛性

令{Xni;1≤i≤in ↑∞,n∈N}为零均值的行两两 NQD 阵列{ani;1≤i≤in ↑∞,n∈N}为正实数阵列,在两两 NQD 阵列范围内讨论其 Jamison 型加权和Sni=A-1ni∑i≤in aniXni强收敛性,丰富了已有的研究结果.     

带有一个适应σ域族随机环境分枝过程的矩

令{Zn}为带有一个适应σ域族{Bn}的随机环境分枝过程,mζn为在Bn条件下子女分布的均值,且mζn几乎必然收敛到mζ·文章主要讨论了{Wn}(Wn=Zn/mn)在L1和L2收敛的充分条件,在这些条件下有:am-n≤EZn≤bm-n,cm-2n≤DZn≤dm-2n,其中0＜a≤b＜+∞,0＜c≤d＜+∞,m=supnθn∈θnsupmθ且m≥1.     

Markedness and its Interpretation in Language Use

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.     

Features of Women's language

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.     

低渗透非均质砂岩油藏启动压力梯度研究

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。     

On Tragic Consciousness In The Works By Ernest Hemingway

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.     

Achieving Unusual States of Matter Under High Pressure

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-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

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     

Call for Papers

<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