欧氏空间E~n中Euler不等式的加强推广(英文)

The relation between the circum-radius and the in-radius of an n-dimensional simplex in E~n is studied.Two new generalizations of Euler inequality for the n-dimensional simplex are established.Besides,we obtain some stronger generalizations of Euler inequality for the n-dimensional simplex than previously known results.     

Two Theorems on Volume and Dihedral Angles of a n—dimensional Simplex

In this paper,we obtain thorem 1 on volum of a n-dimensional simplex and theorem 2 on dihedral angles of a simplex.Besides.We obtain Vasic inequality in E^n and its extension.The results in this paper contain and improve the results in paper[1]、[2]、[3]、[4].     

关于高维单形的一个不等式及应用

本文推广文献 [1 ]的结果 ,获得 En中关于单形的一个不等式 ( 1 ) ,并由此导出 En中面型的彭——常不等式 [5] ( 7)和涉及 n维单形 ∑A内任一点的两个几何不等式 ( 9) ,( 1 0 ) .     

一类涉及两个单形的三角不等式及其应用

应用解析方法和几何不等式理论研究了n维欧氏空间En中涉及两个n维单形的几何不等式问题,建立了涉及两个单形的一类三角不等式.作为其应用,获得了涉及两个单形及其内点的几何不等式,特别,获得了n维单形与其垂足单形的体积的一类关系式,改进了关于垂足单形体积的几类几何不等式.     

单形极集的两个几何不等式及其应用

本文给出关于单形极集的两个几何不等式，作为其应用，获得单形的一个构造定理和关于单形中硕的一个几何不等式。     

有关单形旁切球半径的几何不等式（英文）

In this paper, we study the problems of geometric inequality for the radii of escribed hyperspheres of an n-dimensional simplex in Euclidean space En. Some new geometric inequalities for the radii of escribed hyperspheres of a simplex are established.     

E~n空间中k-n型Neuberg-Pedoe不等式

本文首先利用基本求导法则,证明了涉及单形的n-1维与n维体积的一个几何不等式,由此便得到En空间中k-n型Neuberg-Pedoe不等式.     

New Relaxation Method for Mathematical Programs with Complementarity Constraints

In this paper, we present a new relaxation method for mathematical programs with complementarity constraints. Based on the fact that a variational inequality problem defined on a simplex can be represented by a finite number of inequalities, we use an expansive simplex instead of the nonnegative orthant involved in the complementarity constraints. We then remove some inequalities and obtain a standard nonlinear program. We show that the linear independence constraint qualification or the Mangasarian–Fromovitz constraint qualification holds for the relaxed problem under some mild conditions. We consider also a limiting behavior of the relaxed problem. We prove that any accumulation point of stationary points of the relaxed problems is a weakly stationary point of the original problem and that, if the function involved in the complementarity constraints does not vanish at this point, it is C-stationary. We obtain also some sufficient conditions of B-stationarity for a feasible point of the original problem. In particular, some conditions described by the eigenvalues of the Hessian matrices of the Lagrangian functions of the relaxed problems are new and can be verified easily. Our limited numerical experience indicates that the proposed approach is promising.     

Triangle inequalities associated with the vertex angles and dihedral angles of a simplex and their applications

In this paper, a class of triangle inequalities associated with the vertex angles and dihedral angles of a simplex is given. As an application, we improve an inequality on the volume of the pedal simplex. Received 3 July 2000.     

Generalization and sharpness of the power means inequality and their applications

In this paper, we generalize and sharpen the power means inequality by using the theory of majorization and the analytic techniques. Our results unify some optimal versions of the power means inequality. As application, a well-known conjectured inequality proposed by Janous et al. is proven. Furthermore, these results are used for studying a class of geometric inequalities for simplex, from which, some interesting inequalities including the refined Euler inequality and the reversed Finsler-Hadwiger type inequality are obtained.     

关于内接单形的不等式及其应用

应用解析方法和几何不等式理论研究了n维欧氏空间E~n中涉及n维单形Ω_n与其内接单形Ω′_n的几何不等式的问题,建立了涉及单形Ω_n及其内接单形Ω′_n的外接球半径与高线的一类几何不等式,作为其特例得到了著名的n维Euler不等式的一些推广.     

An Inequality for the Pedal Simplex

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

单形的径向平均体

本文研究了单形的p次径向平均体RpK,证明了单形的p次径向平均体位似于其差分体,得到了Rp(Rq)与Rq(Rp)是相等,并且单形的p次径向平均体的Brunn-Minkowski不等式及唯一性.     

关于单形一个对偶式的商榷与两个新的对偶式

讨论了n维欧氏空间E^n中n维单形不等式的对偶式．利用距离几何理论与解析方法，建立了n维单形两个不等式的对偶式，指出了最近所建立的单形Finsler-Hadwiger不等式的A维对偶式是错误的．     

一个求解线性规划的单纯形-内点算法

根据单纯形方法和大步长路径跟踪算法（Ｈｅｒｔｏｇ，Ｒｏｏｓ和Ｔｅｒｌａｋｙ１９９１），对于具有不等式约束的线性规划问题，引进了一个具有组合特性的内点算法．该方法保留了单纯形方法和内点算法的优点，克服了它们的不足，在任何情况下，这个方法都能快速收敛．数值结果也很好地验证了这个结论．     

The lower estimate for the linear combinations of Bernstein–Kantorovich operators

In this paper we obtain a new strong type of Steckin inequality for the linear combinations of Bernstein–Kantorovich operators, which gives the optimal approximation rate. On the basis of this inequality, we further obtain the lower estimate for these operators.     

球面空间单形的两个几何不等式（英文）

In this paper, by using the theory and method of distance geometry, we study the geometric inequality of a n-dimensional simplex in the spherical space and establish two geometric inequalities involving the edge-length and volume of one simplex and the volume,height and(n-1)-dimensional volume of the side of another simplex in the n-dimensional spherical space. They are the extensions of the results [10] in the n-dimensional Euclidean geometry to the n-dimensional spherical space.     

A Refinement of the Discrete Wirtinger Inequality

In this paper, we obtain an improved discrete Wirtinger inequality associated with a nonlinear second order differential equation. We apply this result to prove a Bonnesen-style isoperimetric inequality for plane polygons and reinterpret the main theorem as a weighted exponential inequality.     

Wirtinger不等式的一个几何应用

本文研究了著名的Minkowski混合面积不等式.利用平面凸集的支持函数的性质和分析中著名的Wirtinger不等式,得到了Minkowski混合面积不等式的一个简化证明.     

Convergence of Galerkin method solutions of the integral equation for thin wire antennas

In this paper we consider the Pocklington integro–differential equation for the current induced on a straight, thin wire by an incident harmonic electromagnetic field. We show that this problem is well posed in suitable fractional order Sobolev spaces and obtain a coercive or Gårding type inequality for the associated operator. Combining this coercive inequality with a standard abstract formulation of the Galerkin method we obtain rigorous convergence results for Galerkin type numerical solutions of Pocklington's equation, and we demonstrate that certain convergence rates hold for these methods.