共查询到19条相似文献,搜索用时 46 毫秒
1.
2.
3.
设含幺交换环R对其乘法子集T的分式环为RT,交换幺半群S在其子半群∑处局部化为S∑本文证明了R[S]对于A的分环式环R[S]AM 构于半群环RT[S∑]。 相似文献
4.
设G(V,E)是一个简单图,而V(T(G))=V(G)∪E(G),E(T(G))={yz│y,z相邻或相关,y,z∈V(G)∪E(G)},则称T(G)为G(V,E)的全图;若对G的每一导出子图H,有x(H)=w(H),则称G是完美的,其中x(H),w(H)分别表示H的色数和团数,本文给了完美全图是Hamilton图的充分必要条件。 相似文献
5.
6.
盛德成 《纯粹数学与应用数学》1991,7(1):125-128
本文综述了半群的根理论的一些主要内容以及国内外发展动态,全文分五部分,第一部分概述了环的根理论;第二部分介绍半群根的一般定义及其表示论的刻划;第三部分介绍各种具体的根,主要是Jacobson根;第四部分介绍等根环的概念;第五部分介绍半群根的研究动态。 相似文献
7.
将一类双曲型方程混合问题转换成一阶抽象Cauchy问题,证明所得Hamilton算子矩阵H在相应空间中生成压缩半群,并借助Fourier变换,采用一致连续半群做逼近的方法,得到H所生成的压缩半群,进而给出了问题的古典解. 相似文献
8.
半群上Rees矩阵半群的半格的结构 总被引:1,自引:0,他引:1
曹永林 《纯粹数学与应用数学》1998,(2)
推广了M.Petrich在文[1]中所用的方法,得到了幺半群上Rees矩阵半群的半格的一个结构定理.研究了单幂幺半群上Rees矩阵半群的半格的性质并给出了矩形单幂幺半群的半格的若干等价刻划. 相似文献
9.
10.
11.
《代数通讯》2013,41(6):2461-2479
Superabundant semigroups are generalizations of completely regular semigroups written the class of abundant semigroups. It has been shown by Fountain that an abundant semigroup is superabundant if and only if it is a semilattice of completely J *-simple semigroups. Reilly and Petrich called a semigroup S cryptic if the Green's relation H is a congruence on S. In this paper, we call a superabundant semigroup S a regular crypto semigroup if H * is a congruence on S such that S/H * is a regular band. It will be proved that a superabundant semigroup S is a regular crypto semigroup if and only if S is a refined semilattice of completely J *-simple semigroups. Thus, regular crypto semigroups are generalization of the cryptic semigroups as well as abundant semigroups. 相似文献
12.
Mario Petrich 《Monatshefte für Mathematik》2000,129(4):329-340
A subsemigroup S of a semigroup Q is an order in Q if for every there exist such that , where a and d are contained in (maximal) subgroups of Q, and and are their inverses in these subgroups. A regular semigroup S is strict if it is a subdirect product of completely (0-)simple semigroups.
We construct all orders and involutions in Auinger’s model of a strict regular semigroup. This is used to find necessary and
sufficient conditions on an involution on an order S in a strict regular semigroup Q for extendibility to an involution on Q.
(Received 27 April 1999; in revised form 20 October 1999) 相似文献
13.
《代数通讯》2013,41(11):5179-5190
The semicentre of an arbitrary group algebra K[G] is studied. In particular necessary and sufficient conditions are shown such that the semicentre is equal to a fixed subring of K[Δ(G)]. Also the semicentre is always equal to a sum of centres of certain subgroup algebras. 相似文献
14.
Summary. A simple mapping approach is proposed to study the bootstrap accuracy in a rather general setting. It is demonstrated that
the bootstrap accuracy can be obtained through this method for a broad class of statistics to which the commonly used Edgeworth
expansion approach may not be successfully applied. We then consider some examples to illustrate how this approach may be
used to find the bootstrap accuracy and show the advantage of the bootstrap approximation over the Gaussian approximation.
For the multivariate Kolmogorov–Smirnov statistic, we show the error of bootstrap approximation is as small as that of the
Gaussian approximation. For the multivariate kernel type density estimate, we obtain an order of the bootstrap error which
is smaller than the order of the error of the Gaussian approximation given in Rio (1994). We also consider an application
of the bootstrap accuracy for empirical process to that for the copula process.
Received: 23 June 1995 / In revised form: 18 June 1996 相似文献
15.
本文导出了色散长波方程簇,并利用屠规彰迹恒等式方法,讨论它们的Hamil-ton结构。 相似文献
16.
17.
18.
左C—wrpp半群的左交错积结构 总被引:1,自引:1,他引:1
本文研究左C-wrpp半群的左交错积结构.利用半群的左交错积,获得了任意左C-wrpp半群都可用左正则带和R-左消幺半群的强半格的左交错积来构造的结构,并给出了具有左交错积结构的左C-wrpp半群的一些性质. 相似文献
19.