Spectral Measures of Spiked Random Matrices

Journal of Theoretical Probability - We study two spiked models of random matrices under general frameworks corresponding, respectively, to additive deformation of random symmetric matrices and...     

用张量导数法求横观各向同性弹性材料的弹性张量的一般形式

用对张量函数求导的方法导出了横观各向同性材料和各向同性材料的弹性张量的一般形式与应力-应变关系式.从推导过程可更清楚地看出为什么横观各向同性材料和各向同性材料分别有五个和两个独立的弹性常数,即材料有几个独立的弹性常数是由其应变能函数的形式所决定的.     

关于损伤张量的阶次

本文首先讨论了较为广泛的连续介质材料的应力变形本构关系,得到了通常以泛函表示的应力变形本构关系的张量表达式.以此为基础,研究了各向异性材料各向异性损伤时,无论从连续介质力学模型出发还是从缺陷模型出发,描述损伤的张量都存在最高阶次的限制;指出了在什么条件下,损伤变量可用低于最高阶次的张量来描述.     

R-n模张量积与张量函子

文[1]引进了左R-n模范畴_RM_n~L,本文是在_RM_n中,建立相应的张量积,证明了它的存在性与唯一性,并讨论了张量函子与Hom函子的伴随性。 文中沿用[1]的记号。     

L—fuzzy模范畴的张量积与张量函子

本文在Ｌ—ｆｕｚｚｙ模范畴中，建立了相应的张量积，给出了它的结构性、存在性与唯一性定理，并讨论了张量函子与Ｈｏｍ函子的伴随性。所得结果为通常张量积的“良好推广”（ｇｏｏｄｅｘｔｅｎｓｉｏｎ）。     

The Generalized Order Tensor Complementarity Problems

The main propose of this paper is devoted to studying the solvability of the generalized order tensor complementarity problem. We define two problems: the generalized order tensor complementarity problem and the vertical tensor complementarity problem and show that the former is equivalent to the latter. Using the degree theory, we present a comprehensive analysis of existence, uniqueness and stability of the solution set of a given generalized order tensor complementarity problem.     

The n-Fold Central Haagerup Tensor Product

This paper defines the n-fold central Haagerup tensor product of a von Neumann algebra R, and shows that the map given by ([a₁a₂...a_n])(x₁, x₂, ...,x_n–1)=a₁x₁a₂x₂...x_n–1a_n is an isometry.     

The Algebra of the Riemann Curvature Tensor in General Relativity: The Relation of the Invariants of the Einstein Curvature Tensor to the Invariants Describing Matter

In this paper, the second in a series of papers on the algebra of the Riemann curvature tensor, we relate the algebraic invariants of the Einstein curvature tensor to the algebraic invariants of the trace-free part of the Ricci tensor, and, consequently, to the trace-free part of the stress-energy tensor for the physical system. We also show explicitly how all of the components of the trace-free part of the Ricci tensor transform under a Lorentz transformation.     

Additive/Multiplicative Free Subordination Property and Limiting Eigenvectors of Spiked Additive Deformations of Wigner Matrices and Spiked Sample Covariance Matrices

When some eigenvalues of a spiked additive deformation of a Wigner matrix or a spiked multiplicative deformation of a Wishart matrix separate from the bulk, we study how the corresponding eigenvectors project onto those of the perturbation. We point out that the subordination function relative to the free (additive or multiplicative) convolution plays an important part in the asymptotic behavior.     

次正定复矩阵的张量积

本文定义了次正定复矩阵的次合同根概念 ,得到了多个次正定复矩阵的张量积仍为次正定复矩阵的充要条件.     

张量空间中的多面体锥

本文利用文献 [1 ]中的结果给出了张量空间中多面体锥的性质 ,指出当 K1,K2 分别为 V1,V2中的多面体锥时 ,由它们所生成的 V1 V2 中的最小真正锥也是多面体锥 ,这一条件不仅是充分的也是必要的 .并利用这一结果对多面体锥的已有结论给出了新的证明     

The (Non)Tensor Structure of BV-Spaces

We prove that the tensor product of the spaces $BV_{{X}_{1}},\ldots,BV_{{X}_{s}}$ is not dense in the space $BV_{{X}_{1}},\times\ldots\times {X}_{s}$ , equipped with the usual BV-norm. After that we give an approximation result for functions of BV_X by tensor product functions, similar to a well-known approximation theorem for functions of BV_X by smooth functions. Finally we show that BV_X is not, what we will call a symmetrized tensor product of the spaces $BV_{{X}_{k}}(k=1, \ldots, s)$ , if we carry out the given construction with any reasonable crossnorm.     

复正定矩阵的张量积

本文给出了多个复正定矩阵的张量积仍为复正定矩阵的充要条件,推广了文[2]的主要结果.     

The C*-envelope of the Tensor Algebra of a Directed Graph

Given an arbitrary countable directed graph G we prove the C*- envelope of the tensor algebra coincides with the universal Cuntz- Krieger algebra associated with G. Our approach is concrete in nature and does not rely on Hilbert module machinery. We show how our results extend to the case of higher rank graphs, where an analogous result is obtained for the tensor algebra of a row-finite k-graph with no sources.     

张量空间中锥的可分解性

在文献 [1 ]的基础上研究张量空间中锥的性质 ,得到了张量空间中射影锥的极端向量的表示形式 .给出了张量空间中射影锥可分解的充分必要条件 ,并由此可得出有限维实空间中真正锥可分解的已有结论 .     

The 1/N Expansion of Colored Tensor Models

In this paper, we perform the 1/N expansion of the colored three-dimensional Boulatov tensor model. As in matrix models, we obtain a systematic topological expansion, with increasingly complicated topologies suppressed by higher and higher powers of N. We compute the first orders of the expansion and prove that only graphs corresponding to three spheres S ³ contribute to the leading order in the large N limit.     

张量方法在信赖域算法中的应用

信赖域算法是求解无约束优化问题的一种有效的算法.对于该算法的子问题,本文将原来目标函数的二次模型扩展成四次张量模型,提出了一个带信赖域约束的四次张量模型优化问题的求解算法.该方法的最大特点是:不仅在张量模型的非稳定点可以得到下降方向及相应的迭代步长,而且在非局部极小值点的稳定点也可以得到下降方向及相应的迭代步长,从而在算法产生的迭代点列中存在一个子列收敛到信赖域子问题的局部极小值点.