共查询到20条相似文献,搜索用时 19 毫秒
1.
We prove that a harmonic diffeomorphism between two Jordan domains with C
2 boundaries is a (K, K′) quasiconformal mapping for some constants K ≥ 1 and K′ ≥ 0 if and only if it is Lipschitz continuous. In this setting, if the domain is the unit disk and the mapping is normalized
by three boundary points condition we give an explicit Lipschitz constant in terms of simple geometric quantities of the Jordan
curve which surrounds the codomain and (K, K′). The results in this paper generalize and extend several recently obtained results. 相似文献
2.
Shangzhi Li 《Geometriae Dedicata》1990,33(3):241-250
All the overgroups of SU(n, K, f) or (n, K, Q) in GL(n, K) are determined, for arbitrary division rings K and arbitrary forms f or Q with positive Witt indices. 相似文献
3.
It is shown that the Ramsey number r(K2,s 1, K1,n) ≤ n √sn (s 3)/2 o(1) for large n, and r(K2,s 1, K1,n)∈{(q-1)2/s 1,-(q-1)2/s 2},wheren (q-1)2/s-q 2 and q is a prime power such that s|(q - 1). 相似文献
4.
5.
Let P k denote a path with k edges and λ K n,n denote the λ-fold complete bipartite graph with both parts of size n. In this paper, we obtain the necessary and sufficient conditions for λ K n,n to have a balanced P k -decomposition. We also obtain the directed version of this result. 相似文献
6.
7.
The authors first give the definition of degenerate weakly (K1,K2)-quasiregular mappings using the technique of exterior power and exterior differential forms, and then, using the method of McShane extension, a useful inequality is obtained, which can be used to derive the self-improving regularity. 相似文献
8.
高红亚 《中国科学A辑(英文版)》2003,46(4)
In this paper, we first give the definition of weakly (K1, K2)-quasiregular mappings, and then by using the Hodge decomposition and the weakly reverse Holder inequality, we obtain their regularity property: For any ql that satisfies 0 < K1n(n+4)/22n+1 × 100n2[23n/2(25n + 1)](n - q1) < 1, there exists p1 = p1(n, q1, K1, K2) > n, such that any (K1, K2)-quasiregular mapping f ∈W(loc)(1,q1)(Ω,Rn) is in fact in W(loc)(1,p1)(Ω,Rn). That is, f is (K1, K2)-quasiregular in the usual sense. 相似文献
9.
Hong Ya GAO Shu Qing ZHOU 《数学学报(英文版)》2007,23(12):2241-2246
We obtain a new inequality for weakly (K1,K2)-quasiregular mappings by using the McShane extension method. This inequality can be used to derive the self-improving regularity of (K1, K2)-Quasiregular Mappings. 相似文献
10.
The concept of a (q, k, λ, t) almost dltterence tamlly (ADF) nas oeen introduced and studied by C. Ding and J. Yin as a useful generalization of the concept of an almost difference set. In this paper, we consider, more generally, (q, K,λ, t, Q)-ADFs, where K = {k1, k2,.…, kr} is a set of positive integers and Q = (q1,q2,... ,qr) is a given block-size distribution sequence. A necessary condition for the existence of a (q, K, λ, t, Q)-ADF is given, and several infinite classes of (q, K, A, t, Q)-ADFs are constructed. 相似文献
11.
主要介绍了一个引理,这个引理奠定了K4-同胚图K4(α,1,1,δ,ε,η)色性研究的基础。 相似文献
12.
Banach lattices CD
0(K,E) and CD
(K,E) are introduced and lattice-norm properties of these spaces are investigated. We identify the centre and order continuous dual of these spaces. 相似文献
13.
M. LASHKARIZADEH BAMI 《数学学报(英文版)》2008,24(4):607-610
In the present paper, it is shown that, for a locally compact commutative hypergroup K with a Borel measurable weight function w, the Banach algebra L^1 (K, w) is semisimple if and only if L^1 (K) is semisimple. Indeed, we have improved compact groups to the general setting of locally a well-krown result of Bhatt and Dedania from locally compact hypergroups. 相似文献
14.
设 F 是任意域.当 K 是 F 的子域且[F:K]<(?)时,或当 K 是 F 的极大子环但不是域时,本文定出了 SL(n,K)在 GL(n,F)中的全部扩群,从而得出了 SL(n,F)的一类极大子群. 相似文献
15.
设 F 是任意域.当 K 是 F 的子域且[F:K]<(?)时,或当 K 是 F 的极大子环但不是域时,本文定出了 SL(n,K)在 GL(n,F)中的全部扩群,从而得出了 SL(n,F)的一类极大子群. 相似文献
16.
金蒙伟 《数学年刊A辑(中文版)》1992,(1)
设K为复平面上紧子集,μ为K上正 Borel测度。R~2(K,μ)(R~∞(K,μ))为极点在K外的有理函数在L~2(μ)(L~∞(μ))范数(弱~*)下的闭包。本文在假设R(K)为Dirichet代数,supportμ?J的情况下,给出了R~2(K,μ)∩L~∞(μ)=R~∞(K,μ)等式成立的充要条件。 相似文献
17.
K1,m∨Pn的均匀全染色 总被引:1,自引:0,他引:1
对一个正常的全染色满足各种颜色所染元素数(点或边)相关不超过1时,称为均匀全染色,其所用最少染色数称为均匀全色数.就星K1,m与路Pn的联图K1,m∨Pn,得到了在m,n不同取值情况下的均匀全色数. 相似文献
18.
Jérôme Chabert Siegfried Echterhoff Hervé Oyono-Oyono 《Geometric And Functional Analysis》2004,14(3):491-528
We study the connection between the Baum-Connes conjecture
for a locally compact group G with coeefficient A and the Künneth
formula for the K-theory of tensor products by the corresponding crossed
product
. The main tool for this is obtained by an application of
a general reduction procedure which allows us to analyze certain functors
connected to the topological K-theory of a group in terms of their restrictions
to compact subgroups. We also discuss several other interesting
applications of this method, including a general extension result for the
Baum-Connes conjecture. 相似文献
19.
引入了(I,K)-(m,n)-内射环的概念,给出了(I,K)-(m,n)-内射环的等价刻划.讨论了(I,K)-(m,n)-内射环与(I,K)-(m,1)-内射环之间的关系及左(I,K)-(m,n)-内射环和右(I,K)-(m,n)-内射环的关系.证明了R是右(I,K)-(m,n)-内射环当且仅当如果z=(m1,m2,…,mn)∈Kn且A∈Im×n,rR(A)∈rRn(z),则存在y∈Km,使得z=yA推广了已知的相关结论. 相似文献