共查询到20条相似文献，搜索用时 203 毫秒
1.
利用F-投射模给出模肘的关于余遗传挠对(T,F)的余局部化的具体形式P/c(K),其中P是M的投射盖,K是.h:P→M的核,c是幂等根函子c:Mod-A→Mod-A,使得MεT(←→) c(M)=M我们记Po(M)=P/c(K).并给出了P,的一些范畴性质. 相似文献
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《蒙自师范高等专科学校学报》2017,(5):124-128
本文利用代数拓扑中的Adams谱序列、Thom谱以及B-配边理论等知识给出高维稳定同伦群π_(2n)~s(Mξ(n,d)∧MBO)挠元的计算,进而得出同伦群π_(2n)~s(Mξ(n,d)∧MBO)的值。 相似文献
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谢开端 《湖南师范大学教育科学学报》2000,(5)
主要讨论了格拟环的基本性质与凸子格拟环格 ,给出并证明了 :A)若L是一个格拟环 ,M是L的一个子拟环 ,则以下条件等价 :1)M是凸子格拟环 ;2 )M是凸的与定向的 ;3)M的右陪集R(M)是一个分配格 ,且 m1,m2 ∈L ,(M +m1) ∨ (M +m2 ) =M +m1∨m2 ,(M+m1) ∧(M+m2 ) =M+m1∧m2 .B)若L是一个格拟环 ,则C(L) ={M｜M是L的一个凸子格拟环 }是一个Brouwerian格 ,并且它是L的子拟环格的子格 相似文献
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在余挠模的基础上引入了n-X余挠模的定义,对n—X-余挠模作了等价刻画．并且引入了模与环上的n-X余挠维数,讨论了n-X余挠维数与其它同调维数之间的关系,推广了一些已有的结论． 相似文献
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蒲义书 《喀什师范学院学报》2007,28(3):5-7
在有补分配完备格上,建立概率、Fuzzy测度与证据理论.讨论了它们的基本特性,给出了三者之间的相互关系.格上的概率与Fuzzy测度类似于通常σ-环上的概率与Fuzzy测度,因为原有的证据理论是在有限集上建立的,为了能在无限格上讨论,现在的定义略有某些差别. 相似文献
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《广东技术师范学院学报》1989,(4)
本文中的R是含幺结合环,(T,Te)是左酉R—模范畴RM中的一个遗传扭论。有关遗传扭论中的T—投射模及T—内射模的概念和部分性质,在[1],[2]中已给出。这里主要是讨论遗传扭论中的另外两类模,即T·M—投射模、T·M—内射模,其中后者是[1],[2]中T—内射模的推广。在文章的后面,将给出相应的T—投射模、T—内射模的一些性质。 相似文献
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设M是一个环类,令∪M={A|(?)O≠A/I,A/I(?)M}.H∪M={A|(?)O≠I△△A,(?)O≠A/J,I/J(?)M}本文证明了当M是r一环类时,H∪M是含在∪M中的最大遗传根,我们称之为由M决定的遗传上根。利用遗传上根,我们给出了超幂零根S与补根S′形成根偶的几个充要条件。 相似文献
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设R是一个环,n、d为两个给定的非负整数,一个R-模M称为(n,d)-平坦,若对于任意n-表示R-模Q,有TorRd+(1Q,M)=0.M称为(n,d)-余挠,若对于任意(n,d)-平坦R-模N,有Ext1R(N,M)=0.本文运用这些定义刻画了n-凝聚环. 相似文献
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彭霞 《成都航空职业技术学院学报》2023,(2):62-64
通过引入并研究了S-平坦模和S-余挠模。证明了任意R-模都有S-平坦盖和S-余挠包。利用S-平坦模和S-余挠模刻画了S-vN正则环和完全环。通过一些例子来区别平坦模和S-平坦模,以及内射模,S-余挠模和余挠模。 相似文献
11.
罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
12.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
13.
邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
14.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
18.
陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
20.
YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献