零维理想的正则列

求一个多元多项式环的理想的正则列是非常重要和困难的问题。在字典序下,一个零维理想的Gr bner基中含有一个极大正则列,并且这个正则列是与顺序没有关系的。零维理想正则列的求出建立在Gr bner基的可计算性和首项理想的根理想的准素分解算法上。

Fourier级数的O^-正则变化收敛模

对f∈L′(T),设S_n(f)=S_n(f,t)为f的Fourier级数的n项部分和,又设{R(n)}为O^-正则变化序列。本文的主要结果是:对1<P≤2,若存在一个正整数n_θ。当n>n_0时有K_n^(?)(f)=1gR(n),则有 i) {Sn(f,t)}(t≠0)在T中几乎处处收敛于f ii) {Sn(f)}依L^1(T)^-范数收敛于f的充分必要条件是(?)(n)1g|n|=0(1),|n|→∞。本文结出的关于{R(n)}的条件比stanojevic在参考文献[1]中结出的条件弱,因此是stanojevic 1987年在参考文献[1]中所获结果的推广。

相容映象的公共耦合不动点定理

在完备度量空间中 ,引入了映象对的渐近正则列概念 ,并在映象对相容的条件下 ,采用渐近正则列的映象逼近方法 ,获得了更为广泛的一类相容映象的公共耦合不动点定理 ,统一和推广了 Hardy G.E.和 RogesT.D.等的相应结果 .

Mapping Theorems on Quasi-Nagata Spaces

In this paper, we discuss the relationship between k-semi-stratifiable spaces and quais-Nagata spaces and some mapping properties of quasi-Nagata spaces. We get following results: sequence-covering closed mapping preserve quasi-Nagata spaces, and finite-to-one open mappings don't preserve quasi-Nagata spaces.

An Inequality Concerning the Center of Simplex's Circumscribed Sphere

Let A={A_1, A_2,…, A_(n+1)} be a simplex in E^n which its center O of circumscribed sphere is in inside of A. If R and R_i are radiuses of A_i respectively (A_i={A_1, A_2,…, A_(i-1), O, A_(i+1),…,A_(n+1)} ,i=1,2,…,n+1),then we have The equality holds if and only if A is a regular simplex.

有限域上多项式集的简单分解

研究如何将任意有限域上的多项式集分解为有限多个简单列.为了解决这一问题,首先研究简单列和根理想之间的关系,然后基于已有的正则分解算法和有限域上理想的根的两种计算方法设计一个有限域上多项式集的简单分解算法.计算试验表明,文章给出的算法是有效的.

Retakh's Conditions (M_0) and Weakly (Sequentially) Compact Regularity

Weakly (sequentially) compactly regular inductive limits and convex weakly (sequentially) compactly regular inductive limits are investigated. (LF)-spaces satisfying Retakh's condition (M0) are convex weakly (sequentially) compactly regular but need not be weakly (sequentially) compactly regular. For countable inductive limits of weakly sequentially complete Frechet spaces, Retakh's condition (M0) implies weakly (sequentially) compact regularity. Particularly for Kothe (LF)-sequence spaces Ep(1 ≤ p < ∞), Retakh's condition (M0) is equivalent to weakly (sequentially) compact regularity. For those spaces, the characterizations of weakly (sequentially) compact regularity are given by using the related results of Vogt.

Hypercube and Tetrahedron Algebra

Let D be an integer at least 3 and let H(D, 2) denote the hypercube. It is known that H(D, 2) is a Q-polynomial distance-regular graph with diameter D, and its eigenvalue sequence and its dual eigenvalue sequence are all {D-2i}D i=0. Suppose that denotes the tetrahedron algebra. In this paper, the authors display an action of ■ on the standard module V of H(D, 2). To describe this action, the authors define six matrices in Mat X(C), called A, A*, B, B*, K, K*.Moreover, for each matrix above, the authors compute the transpose and then compute the transpose of each generator of ■ on V.