QUATERNION GENERALIZED SINGULAR VALUE DECOMPOSITION AND ITS APPLICATIONS

This paper derives a theorem of generalized singular value decomposition of quaternion matrices （QGSVD）,studies the solution of general quaternion matrix equation AXB -CYD= E,and obtains quaternionic Roth＇s theorem. This paper also suggests sufficient and necessary conditions for the existence and uniqueness of solutions and explicit forms of the solutions of the equation.     

On a Solution of the Quaternion Matrix Equation {A \tilde{X} -X B = C} and Its Applications

This paper studies the problem of solution of the quaternion matrix equation ${A \tilde{X} -X B = C}$ by means of real representation of a quaternion matrix, derives a similarity version of Roth’s theorem for the existence of solution to the quaternion matrix equation, and obtains closed-form solutions of the quaternion matrix equation in explicit forms. As a special case, this paper also gives some applications of the solutions of complex matrix equation ${A \bar{X} -X B = C}$ and of the consimilarity of complex matrices.     

四元数矩阵的实表示与四元数矩阵方程

四元数矩阵与四元数矩阵方程在力学和工程问题的理论研究和实际数值计算中都起到重要的作用.该文借助四元数矩阵的实表示方法,研究了一般四元数矩阵方程AXB-CYD=E的解的问题,给出了一种求解四元数矩阵方程的算法技巧.该文还得到了四元数矩阵的Roth's定理.     

四元数矩阵的惯性定理与稳定性

本文给出了四元数矩阵惯性的定义,讨论了四元数体上Lyapunov矩阵方程的唯一解,推广了一般惯性定理、Lyapunov稳定性定理、Carlson-Schneider定理、Stein稳定性定理等一些重要的结果到四元数矩阵,同时得出了四元数体上稳定矩阵的一些判别条件.     

四元数积的弱可交换性及其一个应用

用向量表示四元数.得到四元数乘积的一个弱可交换律,并利用它将四元数体上线性矩阵方程转化为数域上的线性方程组,给出此类方程的一般解法.     

On a Solution of the Quaternion Matrix Equation X - A X B = C and Its Application

This paper first studies the solution of a complex matrix equation X - AXB = C, obtains an explicit solution of the equation by means of characteristic polynomial, and then studies the quaternion matrix equation X - A X B = C, characterizes the existence of a solution to the matrix equation, and derives closed-form solutions of the matrix equation in explicit forms by means of real representations of quaternion matrices. This paper also gives an application to the complex matrix equation X - AXB =C.     

四元数矩阵方程AXB+CXD=E的广义延拓解

本文在四元数体上讨论矩阵方程AXB+CXD=E的广义行（列）共轭延拓解问题.利用四元数矩阵的复与实分解,以及广义共轭延拓矩阵的结构特点,借助矩阵Kronecker积,把约束四元数矩阵方程转化为实数域上无约束方程,从而得到该方程具有广义行（列）共轭延拓解的充要条件及其通解表达式.最后通过数值算例说明所给算法的可行性.     

四元数体上Hermite矩阵的最小化问题

该文建立了四元数矩阵对的标准相关分解(CCD-Q). 借助CCD-Q, GSVD-Q 和有限维内积空间中的投影定理, 该文得到了基于四元数矩阵方程$AXB=C$的Hermite矩阵最小化问题解的表达式.     

四元数分析中无界域上正则函数的带位移非线性边值问题

讨论了四元数分析中无界域上正则函数的一类带位移非线性边值问题.利用积分方程方法和Schauder不动点理论证明了问题解的存在性,并给出了解的积分表达式.     

广义四元数的一次代数方程

本文运用广义四元数代数的矩阵表示讨论了两类广义四元数的一次代数方程的解问题，并得到了这两类代数方程有唯一解、无穷多解，无解的判别条件。