关于幂平均值的一个不等式

给出关于幂平均值的一个不等式Mβ- 1( a) n+ 1 A( a) [G( a) ]n成立的充分必要条件     

涉及两个单形的一个不等式

本文建立了涉及两个n维单形及其内部任意一点的一个含参数的几何不等式,并给出了它的应用。     

关于Euler常数的一个不等式

利用Γ函数的对数微商的渐近公式,我们建立了下面双边不等式:12n+∑2p+1k=1(-1)kBk2kn2k<∑nk=11k-lnn-γ<12n+∑2pk=1(-1)kBk2kn2k,这里γ=0.57721566…是Euler常数,Bk(k=1,2,…)是Bernoulli数,p0和n1是整数.     

积分不等式与P(o)ya-Szeg(o)不等式

The paper brings an important integral inequality,which includes the famous Polya-Szego inequality and the logarithmical-arithmetic mean inequality as special cases.     

辛轨形群胚的辛邻域定理

本文给出一种几何的子轨形群胚的定义,还给出了判定子轨形群胚的依据,并证明了紧子轨形群胚的轨形管状邻域、紧辛子轨形群胚的辛邻域和紧Lagrangian子轨形群胚的Lagrangian邻域的存在性.     

An Inequality for the Pedal Simplex

In this paper, we improve an inequality on the volume of the pedal simplex.     

关于三个算子的算子不等式(英文)

As a generalization of grand Furuta inequality,recently Furuta obtain：If A≥ B≥0 with A0,then for t∈[0,1]and p1,p2,p3,p4≥1, A t 2[A- t 2{A t 2（A/ t 2 Bp 1A /t2 ）p 2A t 2}p 3A -t2 ]p 4A t 2 1 [{（p1/t）p2＋t}p3-t]p4＋t]≤A. In this paper,we generalize this result for three operators as follow：If A≥B≥C≥0 with B0,t∈[0,1]and p1,p2,···,p2n/1,p2n≥1 for a natural number n.Then the following inequalities hold for r≥t, A1/t＋r≥ [A r 2[B /t 2{B t 2······[B /t 2{B t 2（B /t 2 ←B /t 2 n times Bt 2 n/1 times by turns Cp 1B /t 2）p 2B t 2}p 3B /t 2]p 4···B t 2}p 2n/1B /t 2 B /t 2 n times Bt 2 n/1 times by turns→ ]p 2nA r 2] 1/t＋r q[2n]＋r/t, where q[2n]≡{···[{[（p1-t）p2＋t]p3/t}p4＋t]p5/···/t}p2n＋t /t and t alternately n times appear .     

一个积分不等式

由连续单调函数的几何意义直观地得出一个不等式,即若设函数f（x）在[0,b]上连续且单调递减,则有b∫0^af（x）dx≥a∫0^bf（x）dx（0≤a≤b）.通过构造辅助函数给出其数学证明,并对其加以推广．     

一个不等式的证明

文[1]中提出了下述的不等式,即（符号说明见正文）AP＋PQ＋QB≤max{AP PQ′ Q′B,AP′ P′Q QB}。文中说：不难验证此不等式成立,但我们发现,要对此不等式给出一个详细的证明是相当困难的。由于此不等式对该文是相当重要的,本文即对之给出一个详细的证明。     

An Asymptotic Isoperimetric Inequality

For a finite metric space V with a metric , let V ⁿ be the metric space in which the distance between (a ₁ , . . ., a _n ) and (b ₁ , . . ., b _n ) is the sum . We obtain an asymptotic formula for the logarithm of the maximum possible number of points in V ⁿ of distance at least d from a set of half the points of V ⁿ , when n tends to infinity and d satisfies . Submitted: September 1997, Final version: November 1997     

An Improved Hardy's Inequality

In this paper we shall extend Hardy's inequality associated with Fourier transform to the strip n(2-p) ≤ σ < n+p(N +1) where N = [n(1/p-1)], the greatest integer not exceeding n(1/p−1).     

Symplectic Difference Schemes for Hamiltonian Systems in General Symplectic Structure

We consider the construction of phase flow generating functions and symplectic difference schemes for Hamiltonian systems in general symplectic structure with variable coefficients.     

Symplectic convexity for orbifolds

Let a connected compact Lie group G act on a connected symplectic orbifold of orbifold fundamental group Г. If the action preserves the symplectic structure and there is a G-equivariant and mod-Г proper momentum map for the lifted action on the universal branch covering orbifold, and if the lifted G-action commutes with that of Г, then the symplectic convexity theorem is still true for this kind of lifted Hamiltonian action.     

变分不等式问题的一个新的存在性定理

对于具有一般非空闭凸集约束的变分不等式问题 ,本文给出了一个新的例外族的定义 .通过倩同伦不变定理 ,我们证明了一个择一定理 ,这给出了所考虑问题解的一个充分性条件 .特别 ,我们建立了变分不等式问题的一个新的存在性定理 ,推广了Zhao的一个最近的存在性结果 ,进而也推广了著名Mor啨关于非线性互补问题的存在性定理 .     

求解变分不等式的Ishikawa类迭代算法

本文讨论Banach空间中子集非紧的情况下的变分不等式数值解.提出了求解相应问题的Ishikawa类迭代算法,证明了算法的子列收敛性和全局收敛性.同时也证明了变分不等式解的存在性.     

An Exponential Inequality for U-Statistics Under Mixing Conditions

The family of U-statistics plays a fundamental role in statistics. This paper proves a novel exponential inequality for U-statistics under the time series setting. Explicit mixing conditions are given for guaranteeing fast convergence, the bound proves to be analogous to the one under independence, and extension to non-stationary time series is straightforward. The proof relies on a novel decomposition of U-statistics via exploiting the temporal correlatedness structure. Such results are of interest in many fields where high-dimensional time series data are present. In particular, applications to high-dimensional time series inference are discussed.     

高阶可微函数Ostrowski型不等式

研究了一类n阶可微函数,利用其n阶导数上、下界以及Cruis不等式,给出了n阶可微函数Ostrowski型不等式,从而推广二阶可微函数Ostrowski型不等式.     

关于n维单形的一个不等式

Let x₁,x₂… ,x_n are vectors set out from any vertex of n-simplex. The ineluded angle of x_i and x_j is a_ij , and G=(?)a_ij, the volume of this simplex is V. In this paper, we prove the inequality as below:(?) When n=2, the equality holds in (*) , when n≥3, the equality holds in (*) if {x_i} is orthogonal set.     

Opial不等式的推广

本文通过引入一个权函数w(x)[w(x)＞0]证明了Opial不等式可以被推广.特别,当w(x)=1时,得到Opial不等式的一个加强的结果.     

一个非负矩阵的不等式

把 Horst A lzer在 L inear A lgebra and its Application上发表的文章中得到关于指数为 2的非负矩阵的不等式推广到指数为 2 k的一般情况 .并给出了不等式中等号成立的充要条件 .