半群M_n的主因子的极大正则子半群

设Sing_n是[n]上的奇异变换半群,得了变换半群M_n={α∈Sing_n:max{|xα~(-1)}≥|im(α)|(x∈im{α))}的主因子的极大正则子半群的完全分类.     

半群PCS_n的极大子半群

设C_n是X_n上的循环群,SP_n=P_n\S_n称为X_n上的部分奇异变换半群.通过对变换半群PCS_n=C_n∪SP_n的元素的分析,获得了变换半群PCS_n的极大子半群的完全分类.     

半群OCK_n的理想的极大子半群

设X_n={1,2,…,n}并赋予自然数序,OCK_n是X_n上的具有核连续的保序变换半群.将考虑OCK_n的理想OCK(n,r)={α∈OCK_n:|imα|≤r}(3≤r≤n-1),并得到了OCK(n,r)的极大子半群的完全分类.     

偏序集上的滤子极大理想

在偏序集上引入并考察了滤子极大理想的概念,证明了相应的存在性定理。引入并考察了伪极大元和伪既约元的概念,利用图表的形式对连续格中各种类型的既约元和素元之间的关系进行了归纳总结,完善了文献《Continuous Lattices and Domains》(作者:G.Gierz,et al)中的一个图表的相关内容,填补了在分配的连续格情形该图表的一个未知内容,部分地回答了该文献中的一个问题。     

Boole代数中极大滤子的刻画与Cantor三分集

清楚地刻画出有限和由无限可数个基本元生成的Boole代数中极大滤子的具体结构,在全体极大滤子之集上通过自然的方式引入一种紧致的Hausdorff拓扑,证明了当Boole代数可由无限可数个基本元生成时所得的拓扑空间与Cantor三分集同胚.     

格群的子积类

ｌ－群的一个类称作是子积类，如果它封闭于取凸ｌ－子群及完全次直积。设ｕ是一个子积类，Ｇ是一个ｌ－群。令为Ｇ的直和项且Ｇ／Ｈ∈ｕ｝称作是Ｇ的一个子积根式．我们在本文中证明了一个子积类Ｕ由于积根式映射Ｇ→Ｕ（Ｇ）所决定。我们还证明了在子积类的完备格Ｔ中，一组子积类，由子积根式映射所决定，而并则由子积根式映射所决定．这是一个很漂亮的结果。     

奇异保序变换半群的极大正则子半群

设On为通常的有限链Xn={1,2,…,n}上的奇异保序变换半群.文中利用格林关系的方法讨论On的极大正则子半群,确定了On的所有的极大正则子半群.     

极大非独立集可削去的因子临界图

如果对一个简单图G的每一个与G的顶点数同奇偶的独立集I，都有G-I有完美匹配，则称G是独立集可削去的因子临界图．如果图G不是独立集可削去的因子临界图，而对任意两个小相邻的顶点x与y，G xy足独立集可削去的因子临界图，则称G足极大非独立集可削去的因子临界图，本刻画了极大非独立集可削去的因子临界图。     

条件交半格中的相对极大滤子

引入偏序集的相对极大滤子的概念,证明在任意条件交半格中一个滤子是相对极大滤子当且仅当它是滤子格的完全交不可约元.一个格是分配的当且仅当每一个相对极大滤子都是素滤子.随后研究了Heyting代数中相对极大滤子的刻画,最后定义和研究了完全并既约生成格.     

具有循环极大子群的亚循环p-群的自同构群

利用半直积和群扩张的理论,给出了具有极大循环子群的亚循环p-群的自同构群.     

On Plane Maximal Curves

The number N of rational points on an algebraic curve of genus g over a finite field satisfies the Hasse–Weil bound . A curve that attains this bound is called maximal. With and , it is known that maximalcurves have . Maximal curves with have been characterized up to isomorphism. A natural genus to be studied is and for this genus there are two non-isomorphic maximal curves known when . Here, a maximal curve with genus g ₂ and a non-singular plane model is characterized as a Fermat curve of degree .     

Five Kinds of Maximal Monotonicity

We discuss Gossez's type (D) maximal monotone multifunctions and the newer type (ED) subfamily (for which an analog of the Brøndsted-Rockafellar property holds). We then discuss the locally maximal monotone (= type (FP)) and maximal monotone locally (= type (FPV)) multifunctions of Fitzpatrick-Phelps and Fitzpatrick-Phelps-Verona-Verona. Finally, we discuss the strongly maximal monotone multifunctions. We prove that every maximal monotone multifunction of type (D) is locally maximal monotone, and every maximal monotone multifunction of type (ED) is both maximal monotone locally and strongly maximal monotone.     

关于模的最大有理扩张

ｉ）设Ｍ_ｉ为一族左Ｒ－模,记Ｍ_ｉ为Ｍ_ｉ的最大有理扩张,本文首先考察了∑⊕Ｍ_ｉ和∑⊕Ｍ_ｉ之间的关系,并证明了如对环Ｒ上任何一族模上述两者相等的充要条件是环Ｒ上每一个模都有理完全．ｉ）利用ｉ）研究了无零因子环上模的最大有理扩张,得到了一些结果．     

A Note on Lp Boundedness for Maximal Singular Integrals on Product Domains

§ 1.ＩｎｔｒｏｄｕｃｔｉｏｎａｎｄＳｔａｔｅｍｅｎｔｓｏｆＲｅｓｕｌｔｓ　Ｉｔｉｓｗｅｌｌ ｋｎｏｗｎｔｈａｔｔｈｅｍａｘｉｍａｌｓｉｎｇｕｌａｒｉｎｔｅｇｒａｌｏｎｐｒｏｄｕｃｔｄｏｍａｉｎｓｉｓｖｅｒｙｕｓｅｆｕｌｌｉｎｈａｒｍｏｎｉｃａｎａｌｙｓｉｓ.Ｈｅｒｅｗｅｌｉｓｔｔｗｏｒｅｓｕｌｔｓｒｅｌａｔｅｄｔｏｔｈｉｓｐａｐｅｒ.Ｓｅｅ [1 ] ,[2 ]ａｎｄｔｈｅｒｅｆｅｒｅｎｃｅｓｔｈｅｒｅｉｎ .　Ｆｒｏｍ [1 ] ,ｗｅｋｎｏｗｔｈｅｆｏｌｌｏｗｉｎｇｆａｃｔ.　ＳｕｐｐｏｓｅｔｈａｔＫ(ｘ,ｙ)ｉｓｌ…     

Maximal monotonicity, conjugation and the duality product

Recently, the authors studied the connection between each maximal monotone operator and a family of convex functions. Each member of this family characterizes the operator and satisfies two particular inequalities.

The aim of this paper is to establish the converse of the latter fact. Namely, that every convex function satisfying those two particular inequalities is associated to a unique maximal monotone operator.

     

On the tensor algebra of a non-abelian group and applications

We introduce the tensor algebra J() of a crossed complex and give its relations with the James construction for a filtered space. For a group G, we define via multi-derivations the derived algebra I _* G which is isomorphic to the algebra C(JG) of chains on JG We derive from a certain exact sequence for the homology H*JG applications to the homotopy of the suspended classifying space BG.     

On Hardy - Littlewood Maximal Functions in Orlicz Spaces

Let Φ(t) and Ψ(t) be the functions having the following representations Φ(t) = ∫a(s)ds and Ψ(t) = ∫b(s) ds, where a(s) is a positive continuous function such that ∫a(s)/s ds = + ∞ and b(s) is an increasing function such that lim_s→ ∞ b(s) = + ∞. Then the following statements for the Hardy - Littlewood maximal function M f (x) are equivalent:

• 1 (i) there exist positive constants c₁ and s₀ such that
• 1 (ii) there exist positive constant c₂ and c₃ such that

.     

门槛图与度极大图

证明了门槛图与度极大图是一类图的两种不同说法,同时用图的对角限制极左矩阵刻画这一类图的结构。