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1.
本文解决了Gross等人提出的问题在亚纯函数时的相应情形,证明了任何一个亚纯函数都可表示为两个素亚纯函数的乘积。 相似文献
2.
当r?∞时的性状,其中h为f或g.随后,Song和Yang[3]对于logT(r,f(g))/logT(r,h)和loglogM(r,f(g))/loglogM(r,h)讨论了类似的问题。Singh[2]考虑了logT(r,f(g))/T(r,f)。 相似文献
3.
用算子刻划的亚纯单叶函数类 总被引:6,自引:0,他引:6
本文用算子刻划了亚纯星象函数、亚纯凸象函数、亚纯近于凸函数和亚纯拟凸函数的新子类,建立了包含关系,讨论了这些类中函数积分算子的性质。 相似文献
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5.
本文主要讨论了带限制条件的正实部解析函数族及纯凸像函数族的一般极值问题.首先我们得了两类带限制条件的正实部函数族的支撑点的表达式.其次,我们讨论了亚纯凸像函数族的极值问题,得到了亚纯凸像函数族上Frchet可导泛函所对应的极函数的最好形式. 相似文献
6.
给出了函数方程f(z^k)=q(f(z))存在有例外值亚纯解的充要条件及解的一般形式。这里q(z)为给定的k次有理函数。 相似文献
7.
算子Dα及其刻划的亚纯p叶函数类 总被引:1,自引:0,他引:1
用算子Dα刻划了亚纯星象函数,亚纯凸象函数,亚纯近于凸函数和亚纯拟凸函数的新子类,建立了包含关系,讨论了这些类中函数积分算子的性质. 相似文献
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10.
本证明了这样的结论:设G0,G1,…,Gp(p≥1是开平面C中p+1个线性无关的非常数亚纯函数,满足limsupr→∞0≤j≤pmaxN(r,Gj)+p∑pi=0N^-(r,Gi)0≤j≤pmaxT(r,Gj)=σ0又设存在复常数a0,a1,…,ap(a0a1…ap≠0)使得∑bj=0ajGj=1,则有∑pj=0θp(0,Gj)≤p+σ本的结果推广了Niino和Ozawa等人的结论。 相似文献
11.
A rigid isotopy of nonsingular real algebraic curves on a quadric is a path in the space of such curves of a given bidegree.
We obtain the rigid isotopy classification of nonsingular real algebraic curves of bidegree (3, 3) on a hyperboloid and on
an ellipsoid. We also study of the space of real algebraic curves of bidegree (3, 3) with a single node or cusp.
Translated fromMatematicheskie Zametki, Vol. 66, No. 6, pp. 810–815, December, 1999. 相似文献
12.
H. Mohebi A. M. Rubinov 《分析论及其应用》2006,22(1):20-40
We develop a theory of downward sets for a class of normed ordered spaces. We study best approximation in a normed ordered space X by elements of downward sets, and give necessary and sufficient conditions for any element of best approximation by a closed downward subset of X. We also characterize strictly downward subsets of X, and prove that a downward subset of X is strictly downward if and only if each its boundary point is Chebyshev. The results obtained are used for examination of some Chebyshev pairs (W,x), where ∈ X and W is a closed downward subset of X 相似文献
13.
Results on characterization of manifolds in terms of certain Lie algebras growing on them, especially Lie algebras of differential
operators, are reviewed and extended. In particular, we prove that a smooth (real-analytic, Stein) manifold is characterized
by the corresponding Lie algebra of linear differential operators, i.e. isomorphisms of such Lie algebras are induced by the
appropriate class of diffeomorphisms of the underlying manifolds.
The research of Janusz Grabowski supported by the Polish Ministry of Scientific Research and Information Technology under
the grant No. 2 P03A 020 24, that of Norbert Poncin by grant C.U.L./02/010. 相似文献
14.
Two polyester-based polymer concretes with various volume content of diabase as an extender and aggregate are tested in creep
under compression at different stress levels. The phenomenological and structural approaches are both used to analyze the
experimental data. Common features of changes in the instantaneous and creep compliances are clarified, and a phenomenological
creep model which accounts for the changes in the instantaneous compliance and in the retardation spectrum depending on the
stress level is developed. It is shown that the model can be used to describe the experimental results of stress relaxation
and creep under repeated loading. Modeling of the composite structure and subsequent solution of the optimization problem
confirm the possibility of the existence of an interphase layer more compliant than the binder. A direct correlation between
the interphase volume content and the instantaneous compliance of the composite is revealed. It is found that the distinction
in nonlinearity of the viscoelastic behavior of the two polymer concretes under investigation can be due to the difference
in their porosity.
Submitted to the 11th International Conference on Mechanics of Composite Materials (Riga, June 11–15, 2000.)
Translated from Mekhanika Kompozitnykh Materialov, Vol. 36, No. 2, pp. 147–164, 2000. 相似文献
15.
Yew-Kwang Ng 《Mathematical Social Sciences》1980,1(1):51-68
After noting factors (concern for others, ignorance, irrationality) accounting for the divergences between preference and happiness, the question of representing the preference of an individual by a utility function is discussed, taking account of lexicographic ordering, imperfect discrimination and the corresponding concepts of semiorder and sub-semiorder. Methods to improve upon the interpersonal comparability of measures of happiness such as pinning down the dividing line of zero happiness and the use of a just perceivable increment of happiness are discussed. The relation of social welfare to individual welfare (i.e. happiness) is then considered. Some reasonable set of axioms ensuring that social welfare is a separable function of and indeed an unweighted sum of individual welfares are reviewed. Finally, happiness is regarded as a function of objective, institutional and subjective factors; an interdisciplinary approach is needed even for an incomplete analysis. 相似文献
16.
J. C. Ponce Campuzano 《International Journal of Mathematical Education in Science & Technology》2019,50(7):999-1010
ABSTRACTUndergraduate students usually study Laurent series in a standard course of Complex Analysis. One of the major applications of Laurent series is the classification of isolated singular points of complex functions. Although students are able to find series representations of functions, they may struggle to understand the meaning of the behaviour of the function near isolated singularities. In this paper, I briefly describe the method of domain colouring to create enhanced phase portraits to visualize and study isolated singularities of complex functions. Ultimately this method for plotting complex functions might help to enhance students' insight, in the spirit of learning by experimentation. By analysing the representations of singularities and the behaviour of the functions near their singularities, students can make conjectures and test them mathematically, which can help to create significant connections between visual representations, algebraic calculations and abstract mathematical concepts. 相似文献
17.
V. P. Stavrov V. V. Stavrov N. V. Pankova K. Friedrich 《Mechanics of Composite Materials》2000,36(2):155-162
The influence of displacements of tensioned fibers on the impregnation of fibrous layers with a polymer melt and on the final
composite structure is studied. Using computer simulation, it is shown that, during impregnation, the structure of tensioned
fibrous layers changes considerably depending on the initial arrangement and tensioning of fibers. The consolidated regions
formed under the melt front move inside the impregnated layer with the advancing melt front. Displacement of the tensioned
fibers as well as the formation of “washouts” favors the impregnation of internal layers, but cause significant inhomogeneity
of the polymer structure. The surface (on the side of the melt flow) regions are more saturated with the polymer than the
internal ones. A difference in the melt percolation mechanisms at various impregnation regimes is revealed. The effective
permeability coefficients of a tensioned fiber layer are not constant but depend on the conditions and regimes of impregnation.
Submitted to the 11th Conference on the Mechanics of Composite Materials (Riga, June 11–15, 2000).
Translated from Mekhanika Kompozitnykh Materialov, Vol. 36, No. 2, pp. 259–270, March–April, 2000. 相似文献
18.
B. Harlamov 《Acta Appl Math》2003,78(1-3):165-174
The property of absolute continuity of measures in the class of one-dimensional semi-Markov processes of diffusion type is investigated. The measure of such a process can be composed of two measures. The first one is a distribution of a random track, and the second one is a conditional distribution of a time run along the track. The desired density is represented in the form of product of two corresponding densities. 相似文献
19.
Using actions of free monoids and free associative algebras, we establish some Schreiertype formulas involving ranks of actions
and ranks of subactions in free actions or Grassmann-type relations for the ranks of intersections of subactions of free actions.
The coset action of the free group is used to establish a generalization of the Schreier formula in the case of subgroups
of infinite index. We also study and apply large modules over free associative and free group algebras.
This work was supported by Natural Sciences and Engineering Research Council of Canada (Grant No. 227060-04), Yuri Bahturin,
National Science Foundation (Grant No. DMS-0700811) and Russian Fund for Basic Research (Grant No. 08-01-00573), Alexander
Olshanskii 相似文献
20.
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