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1 引言 广义M-矩阵和广义H-矩阵的理论在许多实际问题的研究中有着非常重要的作用,如欧拉方程数值求解中出现的线性系统的块迭代法的收敛性问题,以及动力系统的研究等. 相似文献
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ON THE CAUCHY PROBLEM OF TRANSPORTATION EQUATIONS 总被引:1,自引:0,他引:1
1.IntroductionInthepreselltpaper,weconsiderthetransportationsystemwithinitialdatawherepanduaredensityandvelocityrespectively.Thesystemofconservationlaws(1.1)describesthefluidmechanicswithconstalltpressuxe,whichisusedinplasmaphysicswherepressureisassumedtobeaconstant.Thissystemisnon--strictlyhyperbolicwithadoubleeigenvalueAl~AZ=albothAl,AZbeinglinearlydegenerate.AndtheCauchyproblemforthissystemisnotwell-posedintheclassofmeasurableandboundedfunctions(see[3]).Inthepresentpaper,weintroduceanew… 相似文献
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两类Cayley的向图的同构问题 总被引:2,自引:0,他引:2
证明了对m=1,2,3,有限广义双循环群B(Q8)是m-DCI群当且仅当它的极大交换子群L是m-DCI群且4|-1mm|L|;有限广义二面体群D是m-DCI群当且仅当它的极大交换子群K是m-DCI群且2|-1mm|K|. 相似文献
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一个有向图D称为本原有向图,若存在某自然数k,使D中任一点u到任一点v都有长为k之途径。若D是一个对称有向图,则D是本原的当且仅当D对应的无向图G连通且至少包含一个奇圈。本文研究最小奇圈长为r的n阶对称本原有向图,完全刻划了第一类广义本原指数集,并部分地解决了第三类广义本原指数集的刻划问题。 相似文献
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梁廷 《纯粹数学与应用数学》1993,9(1):117-118
解的有界性为探讨解的正则性所必需。本文在很一般的结构条件下证明下面方程(1)的广义解的有界性,并对(1)的一种特殊情形作出广义解最大模的光验估计。这是椭圆型方程相应结果的推广。设G为n维欧氏空间E~n的有界区 相似文献
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Shao Xianxi 《Annals of Differential Equations》2006,22(4):551-559
This paper discusses the local and global center of the generalized Lienard system, gives two theorems which extend and improve the relative results of [1]-[3]. Moreover the lemmas in this paper are also useful to the study for the oscillation, stability and the existence of limit cycles of the generalized Lienard system. 相似文献
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The authors give the necessary and sufficient conditions for a generalized circle in a Weyl hypersurface to be generalized circle in the enveloping Weyl space. They then obtain the neccessary and sufficient conditions under which a generalized concircular transformation of one Weyl space onto another induces a generalized transformation oil its subspaces. Finally, it is shown that any totally geodesic or totally umbilical hypersurface of a generalized concircularly flat Weyl space is also generalized concircularly flat. 相似文献
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态射的广义Moore—Penrose逆 总被引:22,自引:4,他引:22
本文定义了态射的广义Moore-Penrose逆,给出了它存在的一些充要条件,确定了它的一些表达式,推广了关于态射的Moore-Penrose逆的相应结果。 相似文献
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Mingsheng Ying 《Mathematical Logic Quarterly》1992,38(1):197-201
In [This Zeitschrift 25 (1979), 45-52, 119-134, 447-464], Pavelka systematically discussed propositional calculi with values in enriched residuated lattices and developed a general framework for approximate reasoning. In the first part of this paper we introduce the concept of generalized quantifiers into Pavelka's logic and establish the fundamental theorem of ultraproduct in first order Pavelka's logic with generalized quantifiers. In the second part of this paper we show that the fundamental theorem of ultraproduct in first order Pavelka's logic is preserved under some direct product of lattices of truth values. 相似文献
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ONTHENON-EXISTENCEOFPERIODICSOLUTIONSOFA GENERALIZEDLIENARDSYSTEMHuangLihong(黄立宏)(HunanUniversity)Abstract:Inthispaper,somekn... 相似文献
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1.引言求解薄板弯曲问题的广义协调元法近年来有了发展,本文讨论几种三角形板元之间的等价关系.我们证明,[2]中构造的GCⅢ-T9元等价于Specht元问.同一作者在[4]中构造的GCⅡ-T9元实际上也等价于Specht元,因此,它们彼此等价.另外,[7]中用对称列式构造的一个广义协调元是和作者在问中所引进的单元等价.例已指出,[7]中的那个元等价于问中的VZ1元,所以[7]和[6]中的两个广义协调元均等价于已知的VZ1元.2.广义协调GCⅢ-T9单元设三角形单元K的三个顶点依反时针方向分别为p i(xi,yi),节点参数是pi点处的函数值及其一阶导… 相似文献
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讨论了半线性椭圆型方程奇摄动广义边值问题.在适当的条件下研究了对应的边值问题广义解的存在唯一性及其渐近性态. 相似文献
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本文研究了态射的广义Moore-Penrose逆.给出了范畴中态射的广义Moore-Penrose逆存在的一些新的充要条件.也给出了广义Moore-Penrose逆的乘积公式成立的充要条件。 相似文献
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Qianglian Huang & Shuangyun Gao 《分析论及其应用》2012,28(2):146-155
Utilizing the stability characterizations of generalized inverses of linear operator, we investigate the existence of generalized resolvent of linear pencils in Banach spaces. Some practical criterions for the existence of generalized resolvents of the linear pencil λ→ T λ S are provided and an explicit expression of the generalized resolvent is also given. As applications, the characterization for the Moore-Penrose inverse of the linear pencil to be its generalized resolvent and the existence of the generalized resolvents of linear pencils of finite rank operators, Fredholm operators and semi-Fredholm operators are also considered. The results obtained in this paper extend and improve many results in this area. 相似文献
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This paper is a contionuation of [1] and is concerned with multiplication of weak functions. Here the weak functions are treated as generalized expansions in Hermite functions in [2]. 相似文献
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本文研究了交换环R上所有n×n严格上三角矩阵构成的李代数N(n,R)(n≥5)上广义李三导子.利用矩阵技巧,证明了N(n,R)(n≥5)上任意广义李三导子为一李三导子与一位似映射的和.对于N(n,R)(n≥3)上广义李导子,得出类似结果. 相似文献