调和映照与像域为线性连结的剪切函数的关系

设f(z)=h(z)+g(z)^-为单位圆盘D={z||z|<1}上的局部单叶调和函数,若剪切函数h(z)-g(z)在D上单叶且像域具有M线性连结,研究当伸缩商|ω(z)|=|(g’(z))/(h’(z))|在一定条件下,h(z),F_λ(z)=h(z)+λ×g(z)^- 等函数的单叶性及线性连结性问题,改进推广了陈少林的相应结果.     

某些单叶调和函数的稳定性

对于定义在区域D上的单叶调和映照f(z)=h(z)+-g(z),研究调和函数F(z)=h(z)+λg(z)仍单叶的稳定性问题,以及常数λ的满足条件.此外,推广并得到一些单叶调和函数子类的稳定性结论.     

某类调和函数的单叶半径和Landau定理

研究单位圆盘D上解析部分h(z)满足Re({1+z(h″(z))/(h’(z))}>c(-1/2n及|w(z)|<1的情况,分别给出f(z)的稳定近于凸半径和单叶半径估计.并在同时满足其他条件的情况下,给出单叶区域在调和函数作用下值域最大覆盖圆半径的估计,推广了Chen等的结果.     

对称单叶函数的开始多项式的单叶性

设 k 次对称函数 f_k(z)=z+a_(nk)~(k)+12~(nk+1)在单位圆|z|<1中正则单叶,记σ_n~(k)(z)=z+a_v~(k)z~(vk+1),特别的记σ_n~(1)(z)=σ_n(z).宰格证明了一切σ_n(z)在圆|z|<1/4中单叶,且1/4不能换以更大之数。列文证明了当 n>16时σ_n(n)在|z|1-6(logn)/n中单叶。考利茨     

单叶函数开始多项式的星形半径

1.引言.记S_k={f_k(z)=z a~((k))_(kn 1)z~(kn 1)在|z|<1内正则单叶},S~*_k={f_k(z)∈S_k;|z|<1在f_k(z)映照下的像成星形},简记S_1=S,S~*_1=S~*.对f_k(z)∈S_k(或S~*_k),令s_(k,n)(z)=z a~((k))_(ku 1)z~(kv 1).Szeg(o|¨)证明了:当f(z)∈S时,s_n(z)=s_(1,n)(z)在|z|<1/A内单叶.后来龚升又证明了:当k=2,3时,s_(k,n)(z)在|z|相似文献   

在微分算子作用下调和函数的单叶半径估计

基于单叶调和函数系数模估计的猜想, 在调和函数f(z)=h(z)+g(z)^-的系数模满足猜想条件下,研究 f(z)在L=z?/(?z)-(-overz)?/(?(-overz))作用下的单叶半径问题,分别得到精确的单叶半径表达式.结果表明:在系数模估计满足更一般表达式的条件下,同样也能得到在L作用下L(f)的精确单叶半径估计.     

对称的单叶幂级数的系数和开始多项式

§1.设k次对称函数fk(x)=z sum from v=1 to ∝(a_(vk)_1)~(z~(vk_1))=z sum from v=z to ∝ (a_n~(k)z~(vk 1)在单位圆|z|<1中正则单叶,这类函数的全体称为S_k,设σ_n~(k)=z sum from v=1 to ∝n (a_(vk)_1~(z~(vk 1))。 舍苟证明一切σ_n~(1)(z)在圆|z|<1/4中单叶,且不能易以更大的数,伊列夫证明当     

凸形函数的开始多项式的单叶半径

设 W=f(z)是在单位圆|z|<|内标准化的正则单叶函数。它映照|z|<|于 W 平面上的象为D_f,记其全体为 S 若 D_f 是凸形领域就称 f(z)是|z|<|中的凸形函数。记其全体为 K,拉赫马诺夫证明了 f(z)εK当 n≠4时它的开始多项式(σ_nz)=z+∑~n_v=2 a_vz~v 在圆 z|<1/2中是单叶的。至于 n=4的情况已为单人所证明。本文证明了下面的结果定理1:设凸形奇函数为 f_2(z)εK.记其一切开始多项式为     

一族单叶函数

命 f_p(z)=z+∑~∞_(n=1)a~(p)_(np+1)z~(np+1) p=1,2…… (1)在|z|<1内为正则单叶,且把单位圆写象为凸域,用 K_p 表明这一函数族。命F_p(z)=z+∑~∞_(n=1)b~(p)_(np+1)z~(np+1) p=1,2…… (2)在 |z|<1内为正则单叶,且把单位圆写象为关于原点的星形领域,用 St_p 表明这一函数族。若 f_p(z)ε K_p 则 zf_p′(z)ε St_p;反过来说也对。拉赫马诺夫曾指出函数族 K_p+St_p:     

在第三项系数限制下的Bieberbach猜想

若f(z)=z sum from n=2 to ∞(a_nZ~n)在单位圆|z|<1中正则单叶,本文证明:当|a_3|≤2.44时,|a_n|相似文献   

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