K[X]^m中模的生成基及其应用

本文研究了多项式环上的素模中的生成基理论和方法。通过建立新的约化准则,得到了模中生成基的结构和机械计算方法。对于低维情形给出了素右生成基的充分必要条件。文中的方法本质地简化了传统的模中Grobner基方法。文中同时介绍了该方法在样条理论研究中的应用,并给出了一些计算例子。     

差分-微分模上多个序的Gr(o)bner基及多变量维数多项式

基于2008年Zhou和Winkler给出的计算有限生成的差分-微分双滤模的希尔伯特多项式的算法,文章构造了差分-微分模上相对多个序的的Gr(o)bner基,并给出和证明了计算这种Gr(o)bner基的算法.作为其应用,给出了计算差分-微分模的多变量维数多项式的新算法.推广了Zhou和Winkler (2008)所得结果,也推进了Levin (2007)所得结果.     

差分-微分模上多个序的Grbner基及多变量维数多项式

基于2008年Zhou和Winkler给出的计算有限生成的差分-微分双滤模的希尔伯特多项式的算法,文章构造了差分-微分模上相对多个序的的Grbner基,并给出和证明了计算这种Grbner基的算法.作为其应用,给出了计算差分-微分模的多变量维数多项式的新算法.推广了Zhou和Winkler(2008)所得结果,也推进了Levin(2007)所得结果.     

MBA项目评价与改进系统的反馈动态复杂性分析

中国MBA教育的评价与改进是当前MBA教育发展的瓶颈,为了寻求提升MBA教育质量的有效方法,用系统动力学流率基本入树建模法构建了MBA教育的SD模型.通过用极小基模生成集法对模型中的反馈环进行分析,找到系统基模.在MBA教育SD模型中存在两个增长上限基模和一个舍本逐末基模.根据学习型组织理论:找到管理系统中的基模并用系统思考的方法正确处理基模,是保障系统运行的重要方法.但是,对于一个象MBA教育项目这样的典型动态复杂系统,发现其中所有的基模往往非常困难.本文提供了一个迅速并准确找到复杂系统中全部基模的方法,即极小基模生成集法.不论我们面临的动态系统有多么复杂,都可以使用该方法来分析其中的反馈环结构.构造SD流率基本入树模型,运用该方法进行反馈动态分析,提出了改进中国MBA教育的管理策略.     

有限模框架

研究有限生成Hilbert C*-模中的模框架,来源于信息论中的数据包编码理论.我们计算出模框架的势,刻画了在框架向量丢失的情况下模框架的稳健性和最框优架,得到了由一个或两个酉算子生成的酉系统的Parseval模框架向量的特征.     

X-0-1行列式反馈基模计算法及其应用

提出利用子系统反馈基模分析系统结构的思路,构造了X-0-1行列式并结合系统动力学流率基本人树模型给出计算反馈基模的方法,为复杂系统的反馈分析提供了有效的工具,并给出了在"三农"问题中应用案例.     

置换群直积的张量对称类的秩

假定基环R是特征为零的整环，并且使得它上每个有限生成的投射模是自由模．本文研究有限秩自由R-模的张量积相对于有限个置换群直积而言的张量对称类，给出了张量对称类非平凡的判别准则以及相应张量对称类秩之间的关系式，并将所得结果应用到模情形．     

Noether模的Artin根

本文定义了Ｎｏｃｔｈｅｒ模的Ａｒｔｉｎ根，给出了Ｎｏｃｔｈｅｒ半局部环上有限生成模的Ａｒｔｉｎ根的刻划．最后，作为Ａｒｔｉｎ根理论的应用，给出了一个关于Ｃｏｈｅｎ－Ｍａｃａｕｌａｙ环的定理及一个模的用ｄｅｐｔｈ和ｋｒｕｌｌ维数表示的公式。     

关于内射模和投射模的挠论性质

设R是有单位元的环.τ表示左R—模范畴中的一个挠理论.本文首先研究了τ—内射模、τ—投射模的有关性质,给出一些等价命题.对QF-环作了刻画,其次讨论了τ—内射模的局部化问题;最后刻画了模的τ—挠根结构及补根.文中有关挠理论的概念见[l].     

有限生成平坦模的投射性和内射性

本文给出了每个有限生成平坦模内射，既投射又内射的环类的刻划．给出了每个有限生成平坦模既投射又内射这一环类的分类     

PRIME AND RADICAL SUBMODULES OF MODULES OVER COMMUTATIVE RINGS

ABSTRACT

In this paper, unless otherwise stated, all rings are commutative with identity and all modules are unital. We give sufficient conditions to ensure that a submodule has a module-reduced primary decomposition. In general, the radical of a primary submodule is not prime and the radical does not split intersections of submodules, as is valid in the ideal case. We study sufficient conditions for which these properties hold in the module setting. These conditions involve dimension arguments, consideration of finitely generated modules, and the spectrum of a given prime ideal. Further, we consider the computational problem of finding a Gröbner basis of both the colon and the radical of a submodule. A characterization of the elements of the colon is given, along with a method of computing the radical of a submodule in certain cases.     

On the Algebraic Functional Equation of the Eigenspaces of Mixed Signed Selmer Groups of Elliptic Curves with Good Reduction at Primes above p

Let p be an odd prime number,and let E be an elliptic curve defined over a number field which has good reduction at every prime above p.Under suitable assumptions,we prove that the η-eigenspace and the ■-eigenspace of mixed signed Selmer group of the elliptic curve are pseudoisomorphic.As a corollary,we show that the η-eigenspace is trivial if and only if the ■-eigenspace is trivial.Our results can be thought as a reflection principle which relates an Iwasawa module in a given eigenspace with another Iwasawa module in a "reflected" eigenspace.     

形式实模的核心

通过含单位元的交换环的实素理想构造出对应的模的实素子模,得到模的序存在的一个充要条件,并对模的所有序的支集的交集(文中称作"模的核心")作出一定的刻划,找到了判断模中的元素属于模的核心的充要条件.     

Formal Drinfeld modules

The formal group of an elliptic curve at a finite prime of the field of definition has proven to be a useful tool in studying the elliptic curve. Moreover, these formal groups are interesting in themselves. In this paper we define and study formal Drinfeld modules in a general setting. We also define the formal Drinfeld module associated to a Drinfeld module at a finite prime. The results are applied to the uniform boundedness conjecture for Drinfeld modules.     

THE RADICALS OF HOPF MODULE ALGEBRAS

ＴＨＥＲＡＤＩＣＡＬＳＯＦＨＯＰＦＭＯＤＵＬＥＡＬＧＥＢＲＡＳＺＨＡＮＧＳＨＯＵＣＨＵＡＮ＊ＡｂｓｔｒａｃｔＴｈｅｃｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＨ－ｐｒｉｍｅｒａｄｉｃａｌｉｓｇｉｖｅｎｉｎｍａｎｙｗａｙｓ．Ｍｅａｎｔｉｍｅ，ｔｈｅｒｅｌａｔｉ...     

On Marsaglia's lattice test for pseudorandom numbers

Nonlinear recursive congruential pseudorandom number generators with prime modulus and maximal period length are considered. Those generators are characterized which behave optimally with respect to Marsaglia's lattice test. An example for an extremely bad generator with this property is given, which demonstrates the weakness of this test.     

On right S-Noetherian rings and S-Noetherian modules

In this paper we study right S-Noetherian rings and modules, extending notions introduced by Anderson and Dumitrescu in commutative algebra to noncommutative rings. Two characterizations of right S-Noetherian rings are given in terms of completely prime right ideals and point annihilator sets. We also prove an existence result for completely prime point annihilators of certain S-Noetherian modules with the following consequence in commutative algebra: If a module M over a commutative ring is S-Noetherian with respect to a multiplicative set S that contains no zero-divisors for M, then M has an associated prime.     

Frobenius Full Matrix Algebras and Gorenstein Tiled Orders

It is well-known that if R is a left Noetherian ring, then there is a bijective correspondence between minimal prime ideals of R and maximal torsion radicals of R-Mod. Using the notion of a prime M-ideal, it is shown that this correspondence can be extended to the category σ[M] of modules subgenerated by a module M, provided that M is a Noetherian quasi-projective generator in σ[M]. Furthermore, under this hypothesis the prime M-ideals are the fully invariant submodules P of M such that M/P is semi-compressible.