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1.
设f和g是两个超越整函数,且T(r,f)=O*((log r)νe(log r)α),T(r,g)=O*((log r)β)(即存在4个正常数K1,K2和K3,K4,使有K1(T(r,f))/((log r)νe(log r)α)K2和K2(T(r,g))/((log r)β)K4).其中ν>0,0<α<1,β>1和αβ<1.则对任何a?瘙綒∞,有δ(a,f(g))=δ(a,f),这个结果改进了Goldstein的结果.  相似文献   

2.
§1 引言设f(z)为单位圆内无限级半纯函数,即f(z)的特徵函数(?)(r,f)满足条件:设(?)(r,f)=W(X,f),X=(1-r)~(-1),吾人恒能制作函数ρ(X)适合下列条件:1°ρ(X)为X的连续不减函数;并  相似文献   

3.
设f(z)是下级μ<∞的亚纯函数,a_i(z)是满足T(r,a_i)=0{T(r,f)}的亚纯函数,若??δ(a_i(z),f)=1;δ(∞,f)=1, 则a)f的级λ=μ,且为正整数; b)f的亏函数总数≤μ+1; c)每一个亏量为1/μ的整数倍; d)每一个亏函数都是f的渐近函数.  相似文献   

4.
设 f(z)是下级μ<∞的亚纯函数,α_i(z)是满足 T(r,a_i)=0{T(r,f)}的亚纯函数,若(?)δ(a_i(z)),f)=1;δ(∞,f)=1,则 a),的级γ=μ,且为正整数;b)f 的亏函数总数≤μ+1;c)每一个亏量为1/μ的整数倍;d)每一个亏函数都是 f 的渐近函数。  相似文献   

5.
设 f(z)是一个下级为μ的整函数,记 f(z)的有穷亏值数目为 p,判别有穷渐近值数目为 l.本文证明了如下结果:假设 f(z)的亏量总和Δ(f)(?)=(a,f)=2,δ(a,f)>0,则有 p+l≤2μ.  相似文献   

6.
R上由指数型整函数的Hermite型插值的收敛性   总被引:2,自引:0,他引:2  
证明了如果f∈L1p(R),f'(χ)=O(1/(1 |x|1/p δ),δ>0,且f'在R的任何有限区间上Riemann可积,则limσ→∞||f-Hσ(f)||p(R)=0,其中Hα(f)是f通过由其样本{f(kπ/σ)}k z和{f'(kπ/σ)}k z在Lp(R)中的指数2α型整函数空间B2σ,p中的Hermite型的插值算子.  相似文献   

7.
用勒襄特级数所定义的整函数的型函数   总被引:1,自引:0,他引:1  
设勒襄特级数表示整函数。令M(r)=max |f(z)|。|z|=r 设v>1,并令λ=(v-1)/v~(v/(v-1)), 则如果这式右端为有限正数,则f(z)的阶为零,且不退化为多项式;这时f(z)具有型函数(logr)~v。如果f(z)的阶为有限正数ρ,则这里E(x)为x=y log(ye)的反函数。如果这式右端为有限正数,则f(z)具有型函数γ~ρlogr。  相似文献   

8.
若f(z)为有限级λ的亚纯函数,a1,a2……an为f(z)的n个线性无关的小函数,L(f)=W(a1,a2……an,f)为f(z)的Wronskian行列式,T(r,f)=O(r,L(f)δλ表示有限级λ的亚纯函数集合,K(λ)=inff∈δλ ^-limδ→∞N(r,1/f) N(r,f)/T(r,f),则存在只与n,λ有关的正常数d,满足n/3n 2≤d≤1/3使得∑a∈Cδ(a,L(f)≤2-dK(λ)。  相似文献   

9.
一类整函数的最大模函数与特征函数的关系   总被引:3,自引:0,他引:3  
设 f(z)是下级为μ(μ<+∞)的整函数,满足∑_(a≠∞)δ(a,f)=1.1976年 S.M.Shah 猜测对这一类函数,关系式 (T(r,f))/(log M(r,f))=1/π成立,本文证明了这一猜测。  相似文献   

10.
亚纯函数与其微分多项式分担小函数的唯一性   总被引:1,自引:0,他引:1  
对亚纯函数与其微分多项式CM分担小函数的唯一性进行了研究,得到:设f(z)是非常数亚纯函数,k为正整数,a(z)(0)是亚纯函数,并有T(r,a)=S(r,f)(r∞).如果f-a和p(f)-aCM分担0,p(f)与a(z)没有同级的极点且还满足2δ(0,f) 4Θ(∞,f)>5,则f≡p(f).  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.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
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   

16.
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   

17.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

18.
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   

19.
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   

20.
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   

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