共查询到20条相似文献,搜索用时 504 毫秒
1.
文献[1]对哈奇安算法给出了完整的证明.本文首先指出[1]中引理3的证明过程中存在的问题并重新给出了证明,然后在新结果的基础上作了推广。最后给出一个改进哈奇安算法的实用结果。研究由线性规划问题导出的不等式系统:及其相应的扰动系统:Ax相似文献
2.
A closed 3-manifold M is said to be hyperelliptic if it has an involution τ such that the quotient space of M by the action of τ is homeomorphic to the standard 3-sphere. We show that the hyperbolic football manifolds of Emil Molnár [12] are hyperelliptic.
Then we determine the isometry groups of such manifolds. Another consequence is that the unique hyperbolic dodecahedral and
icosahedral 3-space forms with first homology group ℤ35 (constructed by I. Prok in [16], on the basis of a principal algorithm due to Emil Molnár [13], and by Richardson and Rubinstein
in [18]) are also hyperelliptic. 相似文献
3.
Dr. J. Pintz 《Monatshefte für Mathematik》1976,82(3):199-206
The present paper shows that by an easy modification of the ideas of S. Knapowski and P. Turán [2] one can prove the following Theorem 1: LetV 1 (Y) denote the number of sign changes of π(x)?lix in the interval [2,Y. Then forY>C 1 the inequality $$V_1 (Y) > C_2 (\log \log Y)C_3 $$ holds with positive effectively calculable constantsC 1, C2 andC 3. 相似文献
4.
A. Heppes 《Acta Mathematica Hungarica》1956,7(3-4):463-466
Ohne Zusammenfassung
Vorgelegt von
G. Hajós 相似文献
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In 1983 J. A. Bondy mentioned a result of L.Lovsz. He said that it seems"magic". Now we give a simple proof of this result by using the basic probability theory only, and we may see why this result holds clearly. Let G be a graph with a specified vertex r.A path P=v_1v_2…v_k is rooted at r if v_1=r.For 1≤j≤k, the number of edges of G which are incident with v_j but with no v_i, i相似文献
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9.
在本文中我们得到了一个比[1]中更好的P.Turán问题24的答案:若Hermite—Fejér插值过程对于任何f∈C[-1,1]都一致收敛,则定义于同一组节点上的Lagrange插值过程对于每个f∈{f:En(f)=o(n-(23)/(18)}都一致收敛,这里En(f)为f∈C[-1,1]的用次数≤n的代数多项式逼近的偏差. 相似文献
10.
S. P. Zhou 《Analysis Mathematica》1995,21(4):313-318
. 0pq, 1–1/p+1/p0. f(x) — n, [–1,1],
相似文献
11.
S. Uchiyama 《Acta Mathematica Hungarica》1958,9(3-4):379-380
12.
G. Freud 《Acta Mathematica Hungarica》1958,9(3-4):337-341
Ohne ZusammenfassungVorgelegt vonP. Turán
Mathematisches Forschungsinstitut der Ungarischen Akademie der Wissenschaften 相似文献
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Using C(X)-techniques, we give a simple proof of a recent theorem of I. Juhász: If X is an infinite compact T2space of weight and < is any infinite cardinal, then X has a T2continuous image Y, of weight . We observe that the answer to the analogous question about the values of a cardinal function for subspaces of a topological space follows in several cases from well-known results on chains of subspaces. 相似文献
15.
Tibor K. Pogány 《Integral Transforms and Special Functions》2016,27(10):783-793
Introducing the discrete probability distribution by means of the Prabhakar (or the three-parameter Mittag–Leffler) function, we establish explicit expressions for raw and factorial moments and also general fractional-order moments. Applying an elementary moment inequality we obtain functional upper bounds for the Turánian difference for Prabhakar function. Finally, a Laguerre inequality is proved and functional upper bound has been given for Laguerreian difference for Prabhakar function. 相似文献
16.
Hanni DRIDI 《应用数学学报(英文版)》2023,39(2):306-319
This paper aims to prove the asymptotic behavior of the solution for the thermo-elastic von Karman system where the thermal conduction is given by Gurtin-Pipkins law. Existence and uniqueness of the solution are proved within the semigroup framework and stability is achieved thanks to a suitable Lyapunov functional.Therefore, the stability result clarified that the solutions energy functional decays exponentially at infinite time. 相似文献
17.
We generalise the famous Helly–Lovász theorem leading to a generalisation of the Bárány–Carathéodory theorem for oriented
matroids in dimension ≤3. We also provide a non-metric proof of the latter colourful theorem for arbitrary dimensions and
explore some generalisations in dimension 2. 相似文献
18.
Guo-Liang Xu 《计算数学(英文版)》1984,2(2):170-179
An existence theorem of rational interpolation function for the sufficient condition has correctly been stated by Macon-Dupree in [2], but some arguments in their proof are not true. In this paper: (i) A related theorem for both the sufficient and necessary condition is asserted and proved by a new and rigorous approach, namely by introducing the notion of (m/n) quasi-rational interpolant of a given function. (ii) With use of these results thus obtained an open problem proposed by P. Turán in [4] is completely solved. 相似文献
19.
史应光 《数学年刊A辑(中文版)》1992,(5)
本文给出规范 Hermite-Fejer 插值的 P.Turan 的第 24问题的一个完全解:对于任何规范 Hermite-Fejer插值过程,其对应的定义在同一组节点上的 Lagrange插值过程必对任何满足条件f∈Lipa(a>9/11)的f一致收敛。 相似文献
20.
Hui Li Milena Chermisi 《Calculus of Variations and Partial Differential Equations》2013,48(1-2):185-209
We rigorously derive the von Kármán shell theory for incompressible materials, starting from the 3D nonlinear elasticity. In case of thin plates, the Euler-Lagrange equations of the limiting energy functional reduce to the incompressible version of the classical von Kármán equations, obtained formally in the limit of Poisson’s ratio ν → 1/2. More generally, the midsurface of the shell to which our analysis applies, is only assumed to have the following approximation property: ${\mathcal C^3}$ first order infinitesimal isometries are dense in the space of all W 2,2 infinitesimal isometries. The class of surfaces with this property includes: subsets of ${\mathbb R^2}$ , convex surfaces, developable surfaces and rotationally invariant surfaces. Our analysis relies on the methods and extends the results of Conti and Dolzmann (Calc Var PDE 34:531–551, 2009, Lewicka et al. (Ann. Scuola Norm. Sup. Pisa Cl. Sci. (5) Vol. IX:253–295, 2010, Friesecke et al. (Comm. Pure. Appl. Math. 55, no. 2, 1461–1506, 2002). 相似文献
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