问题式教学法在线代数教学中的应用

简要介绍了作设计的线性代数问题式教学法，该方法以解决求解线性方程组时的三个问题为线索，一一引出该课程的所有概念和理论。     

反证法在解线性代数题中的应用

论述什么是反证法及运用反证法证题的基本步骤,并通过实例说明如何运用反证法解几种不同类型的线性代数问题．     

关于工科“线性代数”课程中的反问题

讨论了工科"线性代数"课程中涉及到的几类简单的反问题,给出了解的存在条件与一般解法.     

论问题式教学中的“问题”

通过对问题式教学法中“问题”的讨论 ,对问题式教学的实践作了一些研究     

从一道线性代数试题的几种证明方法谈起

本文以一道线性代数试题的几种证明方法为例,指出线性代数相关教学过程中应加强主线与构架的讲解,以培养学生分析问题的独特视觉及全方位多层面的分析问题的能力.     

几何直观在线性代数教学中的应用

本文强调了几何直观在线性代数教学中的作用 ,通过例子从代数概念的引入、代数性质的几何解释、代数理论应用的直观分析几个方面加以说明 .     

问题分层教学法在数学教学中的应用

1　问题的提出毫无疑问 ,在同一个班级里 ,不同的学生其知识水平和接受能力是有所差异的 .因此 ,在进行课堂教学设计时 ,应全面考虑各类学生 ,设计的问题应该随学生的思维水平的不同而有所区别 .对思维水平低的同学应该起步低一些 ,设计的问题要小一些 ,思维的步骤铺垫得细一些 ,使他们能感受到成功的快乐 ;而对于思维水平高的同学 ,问题应该设计的大一些 ,思维的跨度大一些 ,使他们的聪明才智得到充分利用 .如何在班级授课制的框架内解决好上述问题 ,使教师创设的问题既符合学生的思维水平又有利于提高他们的思维水平 ,使每个学生都能“跳…     

几何直观在线性代数教学中的应用

本强调了几何直观在线性代数教学中的作用，通过例子从代数概念的引入、代数性质的几何解释、代数理论应用的直观分析几个方面加以说明。     

向量组线性关系式的求法及应用

本给出n维向量中一组向量α1,α2,……,αm的线性关系式k1α1 k2α2 …… kmαm=0中系数k1,k2,……,km的求解方法。这一方法可用于求向量ζ在基ε1,ε2,……,εm下的坐标;两组基的过渡矩阵以及求解非齐次线性方程组的通解三个方面的应用。     

初等变换在工科《线性代数》课程中的应用

本文论述了初等变换在工科《线性代数》课程中的各种应用，并对某些结论给予证明     

高等代数教学方法的探讨

根据对高等代数多年的教学实践经验,通过实例就其教学方法与讲课技巧进行探讨并谈一些体会,为高等代数教学提供新的方法与思路.     

The learning and teaching of linear algebra: Observations and generalizations

This paper is about a teaching experiment (TE) with inservice secondary teachers (hereafter “participants”) in the theory of systems of linear equations. The TE was oriented within particular social and intellectual climates, and its design and implementation took into consideration a series of findings concerning the difficulties students have in linear algebra. The questions we set for this study were: (1) Did the participants in the particular TE climates construct viable knowledge in the theory of systems of linear equations? Our criteria for viable knowledge consist in evidence for the ability to (a) generate non-trivial conjectures, judged so subjectively by a mathematician, (b) prove such conjecture, and (c) move upward along the APOS conception levels. (2) What difficulties and insights did the participants experience as they constructed such knowledge?The potential contributions of our investigation into these questions to researchers and practitioners include (a) a detailed depiction of the participants’ achievements and challenges in dealing with theoretical questions concerning linear systems in an authentic learning environment and under a tutelage oriented in a particular constructivist perspective; and (b) a field-based hypothesis about the consequences of a particular learning environment vis-à-vis construction of knowledge in linear algebra.All of the participants had taken a linear algebra course as part of their undergraduate studies, on average 17 years prior to the TE, with an average grade of about 80%. Thus, a third question set for this study concerns retention. (3) What did the participants retain from their linear algebra courses vis-à-vis concepts, ideas, and problem solving pertaining to the theory of systems of linear equations, assuming they had constructed such knowledge during these courses?     

The generalized HSS method for solving singular linear systems

For the singular, non-Hermitian, and positive semidefinite linear systems, we propose an alternating-direction iterative method with two parameters based on the Hermitian and skew-Hermitian splitting. The semi-convergence analysis and the quasi-optimal parameters of the proposed method are discussed. Moreover, the corresponding preconditioner based on the splitting is given to improve the semi-convergence rate of the GMRES method. Numerical examples are given to illustrate the theoretical results and the efficiency of the generalized HSS method either as a solver or a preconditioner for GMRES.     

The order of a zero of a Wronskian and the theory of linear dependence

Every root of the top Wronskian of a Wronskian matrix whose rank at the root is equal to the number of columns, is of integer order even if the highest derivatives exist only at the root. If the rank of a Wronskian matrix is constant and smaller than the number of rows, then the number of independent linear relations between the functions in the first row is equal to the number of functions minus the rank. These results were proved under additional assumptions by Bôcher, Curtiss, and Moszner. Their proofs are simplified.     

积和式及行列式的一个推广

基于对积和式性质的讨论,给出了积和式的"化长为方"计算方法;基于对积和式概念的研究,作为行列式的推广,给出了一般m×n矩阵的行式定义,讨论了行式的性质和计算方法,推广了克莱姆法则.     

An exponential matrix method for solving systems of linear differential equations

This paper presents an exponential matrix method for the solutions of systems of high‐order linear differential equations with variable coefficients. The problem is considered with the mixed conditions. On the basis of the method, the matrix forms of exponential functions and their derivatives are constructed, and then by substituting the collocation points into the matrix forms, the fundamental matrix equation is formed. This matrix equation corresponds to a system of linear algebraic equations. By solving this system, the unknown coefficients are determined and thus the approximate solutions are obtained. Also, an error estimation based on the residual functions is presented for the method. The approximate solutions are improved by using this error estimation. To demonstrate the efficiency of the method, some numerical examples are given and the comparisons are made with the results of other methods. Copyright © 2012 John Wiley & Sons, Ltd.     

关于解线性系统的一个有效的贝叶斯迭代方法

This paper concerns with the statistical methods for solving general linear systems. After a brief review of Bayesian perspective for inverse problems,a new and efficient iterative method for general linear systems from a Bayesian perspective is proposed.The convergence of this iterative method is proved,and the corresponding error analysis is studied.Finally, numerical experiments are given to support the efficiency of this iterative method,and some conclusions are obtained.     

Systems of matrix linear differential equations of first order

Sufficient conditions for the solvability in quadratures of systems of matrix linear ordinary differential equations of first order with one-sided multiplication by variable matrix coefficients are given in this paper. These conditions are stated in terms of the theory of Lie algebras. We consider matrix equations of higher orders that are equivalent to such systems. An illustrative example is considered. Translated fromMatematicheskie Zametki, Vol. 66, No. 1, pp. 63–75, July, 1999.     

A modified modulus method for symmetric positive‐definite linear complementarity problems

By reformulating the linear complementarity problem into a new equivalent fixed‐point equation, we deduce a modified modulus method, which is a generalization of the classical one. Convergence for this new method and the optima of the parameter involved are analyzed. Then, an inexact iteration process for this new method is presented, which adopts some kind of iterative methods for determining an approximate solution to each system of linear equations involved in the outer iteration. Global convergence for this inexact modulus method and two specific implementations for the inner iterations are discussed. Numerical results show that our new methods are more efficient than the classical one under suitable conditions. Copyright © 2008 John Wiley & Sons, Ltd.