带机器准备时间的平行机排序问题

研究了带机器准备时间的m台平行机排序问题,设计出了一个多项式时间近似方案(PTAS),并给出了一个机器数m为固定常数的情形下的全多项式时间近似方案(FPTAS).     

Reid-Zhi符号数值混合消元方法的一个应用

将Reid和Zhi提出的符号数值混合消元方法应用于求解多项式优化问题,将多项式优化问题转化为矩阵最小特征值求解问题,并在Maple软件中实现了算法.     

n元对称多项式的对称核及应用

研究了具有n个变元的对称多项式的相关问题.这里n是整变量,泛指一切正整数.此类问题已经超出了Tarski判定算法所能处理的初等问题的范围.研究的主要方法是将n变元对称多项式表示为一种特殊多项式的和,即对称核的和.给出了计算对称核的方法.作为应用,得到了几类n变元对称多项式不等式成立的充要条件.     

M带含参数对称正交插值尺度函数的构造

<正>1引言基于多分辨分析方法,已经构造了大量各种各样的单小波,如紧支撑的正交的Daubechies小波,紧支撑半正交的样条小波等.Daubechies证明了除Haar小波外不存在紧支撑正交对称的2带单小波.为了弥补2带单小波的不足,许多数学工作者将它进行推广得到了:双正交小波、多小波、多带小波等几大分支.而在实际应用中有时需要处理一些具有相对窄的带宽的高频信号,所以很有必要研究多带小波.同时多带小波能同时拥     

Counting isomorphism classes of pointed hyperelliptic curves of genus 4 over finite fields with even characteristic

This paper is devoted to counting the number of isomorphism classes of pointed hyperelliptic curves over finite fields. We deal with the genus 4 case and the finite fields are of even characteristics. The number of isomorphism classes is computed and the explicit formulae are given. This number can be represented as a polynomial in q of degree 7, where q is the order of the finite field. The result can be used in the classification problems and it is useful for further studies of hyperelliptic curve cryptosystems, e.g. it is of interest for research on implementing the arithmetics of curves of low genus for cryptographic purposes. It could also be of interest for point counting problems; both on moduli spaces of curves, and on finding the maximal number of points that a pointed hyperelliptic curve over a given finite field may have.     

A decomposition theorem for G-groups

Some classical results about linear representations of a finite group G have been also proved for representations of G on non-abelian groups （G-groups）. In this paper we establish a decomposition theorem for irreducible G-groups which expresses a suitable irreducible G-group as a tensor product of two projective G-groups in a similar way to the celebrated theorem of Clifford for linear representations. Moreover, we study the non-abelian minimal normal subgroups of G in which this decomposition is possible.     

Commutant of analytic Toeplitz operators on the Bergman space

In this paper, we characterize the commutant of Toeplitz operators on weighted Bergman space with symbol polynomial by using algebraic curves theory.     

特征2上的Special代数S(3,1)的投射表示

本文研究了特征为2的代数闭域上Special代数S(3,1)的投射不可分解模.利用Nakano给出的BGG互反性,并通过研究不可约S(3,1)模限制为W(2,1)模的分解模式,给出了特征标高度htx≤0的所有投射不可分解模同构类的代表元和Cartan不变量.     

多元分离子的构造与应用

本文研究了两类多元分离子的构造方法并提出计算公式.分析了多元分离子与Groebner 基的关系.把所求分离子应用到多元插值问题上,得到在字典序与广义字典序下用分离子表示的多元插值多项式.数值模拟显示了所述方法的有效性.     

基本Bernstein多项式的一个积分不等式(英文)

本文研究了Bernstein多项式.通过归纳法,建立了一个与基本Bernstein多项式有关的积分型不等式.