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四元数体上重行列式的性质及其应用 总被引:18,自引:1,他引:17
本文得到了四元数体上重行列式的一些基本不等式,给出了矩阵为正定自共轭阵时,行列式与重行列式的显式关系,同时也给出了文[1]中行列式与文[5]中行列式两种定义的关系。提出了四元数体上广义正定自共轭阵的概念,并获得了这类阵的基本性质. 相似文献
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本文首先按Dieudonne意义下行列式给出了正定自共轭矩阵行列式的一个极小值。进而,改进了Hadamard不等式,并指出,按谢邦杰意义下行列式,有类似结论,推广了[1]-[4]的结果。 相似文献
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针对线性代数教材中一道行列式证明题,利用行列式的性质,给出多种证明方法,旨在启发学生对相关行列式计算或证明题的解题方法进行探索. 相似文献
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“杨辉三角”中某些矩阵及其行列式的讨论 总被引:1,自引:0,他引:1
“杨辉三角”中某些矩阵及其行列式的讨论张之正,刘麦学(河南洛阳师范专科学校数学系471022)近来,许多作者对杨辉三角中的矩阵和行列式进行了讨论(如[1]─[5]),文[6]还给出了一类矩阵的逆矩阵的求法.本短文对这些矩阵及行列式做进一步的探讨.杨辉... 相似文献
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指出四元数阵重行列式可用复阵行列式来表示,于是,复阵的伴随矩阵、求逆阵公式、秩的下界等,都可相应地推广到四元数阵. 相似文献
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建立了复正定矩阵的几个行列式不等式,将正定Hermite阵的Minkowski不等式、 Ostrowski-Taussky不等式推广到了复正定矩阵上,推广改进了一些文献的结果. 相似文献
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K. K. CHONG 《数学年刊A辑(中文版)》2002,(1):75-84
Refinements to inequalities on inner product spaces are presented. In this respect, inequalities dealt with in this paper are: Cauchy's inequality, Bessel's inequality, Fan-Todd's inequality and Fan-Todd's determinantal inequality. In each case, a strictly increasing function is put forward, which lies between the smaller and the larger quantities of each inequality. As a result, an improved condition for equality of the Fan-Todd's determinantal inequality is deduced. 相似文献
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K. K. CHONG 《数学年刊B辑(英文版)》2002,23(1):75-84
51. IntroductionIn recent years, refinements or interpolations have played an important role on severaltypes of inequalities with new results deduced as a consequence. Please refer to the papers[2, 8, 9, 12], etc. The aim of this paper is to furnish refinements of the Cauchy's and Bessel'sinequalties as shown in Section 2, and also refinements of the Fan-Todd's inequality and theFan-Todd's determinantal inequality in Sections 3 and 4, with an improved condition forequality derived.First of… 相似文献
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It is shown that the ω- and τ-matrices, the weakly sign symmetric matrices, the R- and V-matrices, and the matrices c-equivalent to an M-matrix or to a real matrix with nonpositive off-diagonal elements, can all be characterized by the same determinantal inequality, which we call a generalized Fan inequality. 相似文献
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S. S. Dragomir Y. J. Cho S. S. Kim J. Roumeliotis 《Journal of Applied Mathematics and Computing》2006,20(1-2):279-292
A reverse of Bessel’s inequality in 2-inner product spaces and companions of Grüss inequality with applications for determinantal integral inequalities are given. 相似文献
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关于《余A-G型Ky Fan不等式》的发展 总被引:1,自引:0,他引:1
Two new proofs of a discrete Ky Fan inequality of the comple mentary A-G type are given. Its continuous version and determinantal analogue on a set of pairwise commutative positive definite matrices are established. A further extension concerning general positive definite matrices of the inequality is also suggested. 相似文献
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Minghua Lin 《Linear and Multilinear Algebra》2017,65(10):2024-2030
We revisit and comment on the Harnack type determinantal inequality for contractive matrices obtained by Tung in the nineteen sixties and give an extension of the inequality involving multiple positive semidefinite matrices . 相似文献
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A counterexample is given to the permanental analog (of the titled determinantal inequality) asserted in the titled paper. The fault lay with an invalid identity used in its proof. 相似文献
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The problem of writing real zero polynomials as determinants of linear matrix polynomials has recently attracted a lot of attention. Helton and Vinnikov [9] have proved that any real zero polynomial in two variables has a determinantal representation. Brändén [2] has shown that the result does not extend to arbitrary numbers of variables, disproving the generalized Lax conjecture. We prove that in fact almost no real zero polynomial admits a determinantal representation; there are dimensional differences between the two sets. The result follows from a general upper bound on the size of linear matrix polynomials. We then provide a large class of surprisingly simple explicit real zero polynomials that do not have a determinantal representation. We finally characterize polynomials of which some power has a determinantal representation, in terms of an algebra with involution having a finite dimensional representation. We use the characterization to prove that any quadratic real zero polynomial has a determinantal representation, after taking a high enough power. Taking powers is thereby really necessary in general. The representations emerge explicitly, and we characterize them up to unitary equivalence. 相似文献
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We obtain a Fischer type determinantal inequality for matrices with given angular numerical range. We discuss the growth factor for Gaussian elimination for linear systems in which the coefficient matrix has this form and give a proof of Higham?s Conjecture. 相似文献