关于n-亚换位子群

本文从n-亚换位子群的定义出发，得到了它的几条重要性质，作为应用，给出了一个群为n-Abelian群的一个充要条件及p-Abelian群的一个判别法。     

关于CVD 矩阵的n- 宽度

本文证明了d_2k =δ_2k =d^2k ≥b_2k，其中d_2k ,δ_2k , b_2k分别表示Ａ（Ｂｌ^M_p）在ｌ^N_q下的Ｋｏｌｍｏｇｏｒｏｖ，线性，Ｂｅｒｎｓｔｅｉｎ ２ｋ－宽度，ｄ^2k 表示Ａ^Ｔ（Ｂｌ^N相似文献   

关于Clifford矩阵群的代数收敛性

在条件B之下,本文得到了Clifford矩阵群,即n维M■bius群的非初等子群列｛Gm｝的几个代数收敛定理,并且证明了一致有界挠群列满足离散群所必须满足的条件。     

关于矩阵群逆的逆序律

得到了体上两个n阶方阵A,B的群逆A#,B#若存在,则其乘积的群逆(AB) #也存在,且(AB) #=B#A#成立的充分与必要条件是:存在n阶可逆矩阵P使得A =Pdiag(A1,A2 ,…,As) P- 1,B =Pdiag(B1,B2 ,…,Bs) P- 1且对于任意i(i=1 ,2 ,…,s)有Ai,Bi阶数相同,Ai,Bi为可逆矩阵或为0矩阵;又对i≠1有Ai Bi=0 .     

关于Clifford矩阵群的代数收敛性

在条件B之下,本文得到了Clifford矩阵群,即n维Mbius群的非初等子群列{Gm}的几个代数收敛定理,并且证明了一致有界挠群列满足离散群所必须满足的条件B.     

关于高维Hadamard矩阵猜想的证明

所谓n维m阶m~nHadamard矩阵(以下简称H阵)A=[A_h(0),h(1)···h(n-1)]是指其满足如下条件：i)A_h(0)···h(n-1)=±1(0≤h(0),h(1)···h(n-1)≤m-1)     

关于n-分割集

<正> Baston和Bostock推广了Kelly的一个引理,提出了n-分割集的概念.m维Euclid空间中若干点P_1,…,P_n的凸包记作conv{P_1,…,P_n},其相对内部记作ric{P_1,…,P_n}. 定义1.1 设A和B是R~m中有限点集,称A和B为n-分割,若对A的任意n个点a_1,…,a_n,有B的点属于ric{a_1,…,a_n};反之,B的任意n个点b_1,…,b_n,也有A的点属于ric{b_1,…,b_n}. 他们得到如下结果     

关于体上分块矩阵的群逆

本文利用分块矩阵方法．研究了体上两个矩阵乘积的群逆的存在性及表示形式，给出了体上两个矩阵乘积群逆存在的充分必要条件和表示形式．并且在一定条件下．给出了体上分块矩阵的群逆存在性及表示形式．     

关于群布尔矩阵的收敛和周期

在文[1]和[2]中,各自得到了如下结果：一个循环布尔矩阵A是本原的当且仅当gcd（i2-i1,…,i1-i1,n）＝1,其中A＝Pi1十Pi2十…＋Pi1,0≤i1＜i2＜…＜i1≤n-1,P是对应于n阶循环置换（123…n）的置换矩阵．在本文中,先把此结果推广到群矩阵（一种循环矩阵的推广）．其次,讨论群布尔矩阵的周期．给出了计算周期的算法,最后,探讨循环布尔矩阵A的使Am p＝Am的最小正整数m.     

关于群表示的分解矩阵和Cartan矩阵的两个结论

讨论了群表示中关于Cartan矩阵,Brauer特征等的性质,得到了一些结论,由这些结论,引进了所谓高度的一类概念,利用这一类概念证明了群表示论中关于分解矩阵和Cartan矩阵的两个结论.     

On the Discreteness and Convergence in n-Dimensional Mobius Groups

Throughout this paper, we adopt the same notations as in [1,6, 8] such as the Möbius group M(Rⁿ), the Clifford algebraC_n–1, the Clifford matrix group SL(2, _n), the Cliffordnorm of ||A||=(|a|²+|b|²+|c|²+|d|²) (1) and the Clifford metric of SL(2, _n) or of the Möbius groupM(Rⁿ) d(A₁,A₂)=||A₁–A₂||(|a₁–a₂|²+|b₁–b₂|²+|c₁–c₂|²+|d₁–d₂|²)(2) where |·| is the norm of a Clifford number and represents f_i M(), i = 1,2, and so on. In addition, we adopt some notions in [6, 12]:the elementary group, the uniformly bounded torsion, and soon. For example, the definition of the uniformly bounded torsionis as follows.     

有关Clifford矩阵群的几个离散性判别准则

研究了Clifford矩阵变换群的离散性质,给出了几个判别离散群的不等式和定理.     

Constructible Matrix Groups

We prove that the additive group of a ring K is constructible if the group GL ₂ (K) is constructible. It is stated that under one extra condition on K, the constructibility of GL ₂ (K) implies that K is constructible as a module over its subring L generated by all invertible elements of the ring L; this is true, in particular, if K coincides with L, for instance, if K is a field or a group ring of an Abelian group with the specified property. We construct an example of a commutative associative ring K with 1 such that its multiplicative group K* is constructible but its additive group is not. It is shown that for a constructible group G represented by matrices over a field, the factors w.r.t. members of the upper central series are also constructible. It is proved that a free product of constructible groups is again constructible, and conditions are specified under which relevant statements hold of free products with amalgamated subgroup; this is true, in particular, for the case where an amalgamated subgroup is finite. Also we give an example of a constructible group GL ₂ (K) with a non-constructible ring GL. Similar results are valid for the case where the group SL ₂ (K) is treated in place of GL ₂ (K) .     

Gluing Compact Matrix Quantum Groups

We study glued tensor and free products of compact matrix quantum groups with cyclic groups – so-called tensor and free complexifications. We characterize them by studying their representation categories and algebraic relations. In addition, we generalize the concepts of global colourization and alternating colourings from easy quantum groups to arbitrary compact matrix quantum groups. Those concepts are closely related to tensor and free complexification procedures. Finally, we also study a more general procedure of gluing and ungluing.

     

Constructive Matrix and Orderable Groups

We study into the relationship between constructivizations of an associative commutative ring K with unity and constructivizations of matrix groups GL _n(K) (general), SL _n(K) (special), and UT _n(K) (unitriangular) over K. It is proved that for n 3, a corresponding group is constructible iff so is K. We also look at constructivizations of ordered groups. It turns out that a torsion-free constructible Abelian group is orderly constructible. It is stated that the unitriangular matrix group UT _n(K) over an orderly constructible commutative associative ring K is itself orderly constructible. A similar statement holds also for finitely generated nilpotent groups, and countable free nilpotent groups.     

Applications of Matrix Algebra to Clifford Groups

In this paper, we will show that all of nonzero vectors and nonzero bivectors in the Clifford algebra ${\mathcal{C} \ell_{0,3}}$ are invertible and we will find some conditions for those objects to be element of the Clifford group ??_0,3 using the corresponding properties in the subalgebra L ₈ of the matrix algebra ${M_8 \mathbb{(R)}}$ .     

n-Dimensional hyperbolic complex numbers

Direct product rings have received relatively little attention, perhaps because they are sometimes labeled “trivial” [8, p.6]. Nevertheless, the 2-dimensional direct product ring of the reals, when expressed in the “hyperbolic basis”, is analogous in many ways to the system of complex numbers and also has a physical interpretation. This prompted an exploratory foray into the world ofn-dimensional direct product rings of the reals to see how much can be extended from the 2-dimensional case (see, e.g. [3,4,5]). Section 1 provides algebraic notation, up to the point of defining polar coordinates. Section 2 uses analysis to explore differentiability and conformality.     

n-Dimensional dual complex numbers

It is well-known that the quadratic algebrasQ _a,b = {z|z =x +qy,q ² =a +qb ,a, b, x, y ε ℝ,q ∉ ℝ }, also expressible as ℝ[x]/(x ² -bx -a), are, up to isomorphism, equivalent to just three algebras, corresponding to elliptic, parabolic and hyperbolic. These three types are usually represented byQ _−1,0,Q _0,0,Q _1,0 and called complex numbers, dual complex numbers and hyperbolic complex numbers, respectively. Each in turn describes a Euclidian, Galilean and Minkowskian plane. The hyperbolic complex numbers thus provide a 2-dimensional spacetime for special relativity physics (see e.g. [6]) and the dual complex numbers a 2-dimensional spacetime for Newtonian physics (see e.g. [17]). The present authors considered extensions of the hyperbolic complex numbers ton dimensions in [8], and here, in somewhat parallel fashion, some elements of algebra (in Section 1) and analysis (in Section 2) will be presented forn-dimensional dual complex numbers.      

On a Sparse Representation of an n-Dimensional Laplacian in Wavelet Coordinates

Important parts of adaptive wavelet methods are well-conditioned wavelet stiffness matrices and an efficient approximate multiplication of quasi-sparse stiffness matrices with vectors in wavelet coordinates. Therefore it is useful to develop a well-conditioned wavelet basis with respect to which both the mass and stiffness matrices are sparse in the sense that the number of nonzero elements in each column is bounded by a constant. Consequently, the stiffness matrix corresponding to the n-dimensional Laplacian in the tensor product wavelet basis is also sparse. Then a matrix–vector multiplication can be performed exactly with linear complexity. In this paper, we construct a wavelet basis based on Hermite cubic splines with respect to which both the mass matrix and the stiffness matrix corresponding to a one-dimensional Poisson equation are sparse. Moreover, a proposed basis is well-conditioned on low decomposition levels. Small condition numbers for low decomposition levels and a sparse structure of stiffness matrices are kept for any well-conditioned second order partial differential equations with constant coefficients; furthermore, they are independent of the space dimension.     

Correction to: Gluing Compact Matrix Quantum Groups

Algebras and Representation Theory - A Correction to this paper has been published: