共查询到18条相似文献,搜索用时 62 毫秒
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将所有维数的 Beltrami方程组 Dtf· Df =J2 /n G化为一个“Beltrami方程”并利用它研究了 Bel-trami方程组的解的正则性 ,得到一个比文献 [8]更大的正则性区间 . 相似文献
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(G,H)-拟正则映照和B-调和方程 总被引:4,自引:0,他引:4
本文将双特征拟正则映照化为变化问题,得到其Euler-Lasranse方程,利用它得到B-调和方程的先验估计、拟正则映照的Caccippoli型不等式、正则性和可去性结果. 相似文献
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本文讨论了不可缩小Beltrami系数与无限小不可缩小Beltrami系数的局部 性与整体性的关系;并通过烟囱形区域上仿射拉伸的实例,指出构造一类极值的具有 非常数模的不可缩小Beltrami系数与无限小不可缩小Beltrami系数的方法. 相似文献
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对于低于自然可积指数Sobolev类Wloc1,p(Ω,Rn)(1<p<n)的弱拟正则映射,建立了其广义微商可积指数提高到大于空间维数n结果,从而得出拟正则映射的可去奇异集的Hausdorff维数大于零的结论.本文是从弱拟正则映射定义出发对Iwaniec的有关结果给出一个简化证明. 相似文献
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该文研究空间Beltrami方程的推广形式,即双特征Beltrami方程.利用外微分形式与矩阵的外代数等工具,将双特征Beltrami方程转化为一个非齐次的狆 调和方程,转化过程中只用到加于特征矩阵的一致椭圆型条件.然后验证了算子犃满足的条件:Lipschitz型条件、单调不等式、齐次性条件以及算子犅满足的控制增长条件.并利用得到的狆 调和方程,给出了双特征Beltrami方程广义解分量函数的弱单调性结果. 相似文献
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该文考虑广义Beltrami方程组D~tf(x)H(x)Df(x)=J(x,f)~(2/n)G(x).(*)利用能量和变分方法,在矩阵H(x),G(x)∈S(n)满足一致椭圆型条件下,得到了(*)式所满足的齐次散度型椭圆方程DivA(x,Df(x))=0,并得到了(*)式的分量函数的弱单调性和Caccioppoli不等式. 相似文献
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The rate of growth of the energy integral of a quasiregular mapping
is estimated in terms of a special isoperimetric condition on
. The estimate leads to new Phragmen-Lindelof type theorems. 相似文献
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蒋威 《数学物理学报(A辑)》2007,27(6):1006-1012
该文首先研究了退化时滞微分系统的特征根分布, 指出如果退化时滞微分系统的所有特征根都具有负实部, 在一个条件下, 特征根的负实部的最大值为负.由此可以得到一个条件, 在该条件下如果所有特征根都具有负实部, 则退化时滞微分系统的解是指数稳定的.作为例子, 对中立型给出其解为指数稳定的条件. 相似文献
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环Z/pkZ上s次幂等矩阵及矩阵的加权广义逆 总被引:7,自引:0,他引:7
设R=Z/pkZ是模pk的有限局部环,其中p是素数,k>1,p≠2.本文确定了R上n阶s(s≥3)次幂等矩阵的伪标准形,得到了R上n阶矩阵A的加权{ , }-广义逆矩阵的计数定理. 相似文献
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In this paper, we introduce and study a new class of general strongly nonlinear quasivariational inequalities and construct a general iterative algorithm by using the projection method. We establish the existence of a unique solution for general strongly nonlinear quasivariational inequalities involving relaxed Lipschitz, relaxed monotone, and strongly monotone mappings; we obtain the convergence and stability of the iterative sequences generated by the algorithm. Our results extend, improve, and unify many known results due to Bose, Noor, Siddiqi-Ansari, Verma, Yao, Zeng, and others. 相似文献
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The paper provides a combinatorial method to decide when the space of local systems with nonvanishing first cohomology on the complement to an arrangement of lines in a complex projective plane has as an irreducible component a subgroup of positive dimension. Partial classification of arrangements having such a component of positive dimension and a comparison theorem for cohomology of Orlik–Solomon algebra and cohomology of local systems are given. The methods are based on Vinberg–Kac classification of generalized Cartan matrices and study of pencils of algebraic curves defined by mentioned positive dimensional components. 相似文献
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We study the similarity of a pair of matrices of even order with special Smith form and certain conditions for the decomposability of the characteristic matrix of the pair. In this connection, we obtain a complete system of invariants for this class of pairs of matrices with respect to similarity. The results obtained are stated in the classical terms of ranks, of minimal indices, and of elementary divisors of matrices (both finite and infinite). 相似文献
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Li Ping HUANG 《数学学报(英文版)》2007,23(1):95-102
Let D be any division ring with an involution,Hn (D) be the space of all n × n hermitian matrices over D. Two hermitian matrices A and B are said to be adjacent if rank(A - B) = 1. It is proved that if φ is a bijective map from Hn(D)(n ≥ 2) to itself such that φ preserves the adjacency, then φ^-1 also preserves the adjacency. Moreover, if Hn(D) ≠J3(F2), then φ preserves the arithmetic distance. Thus, an open problem posed by Wan Zhe-Xian is answered for geometry of symmetric and hermitian matrices. 相似文献