Foreword(Originally in Chinese) Preface(for the English Translation edition) A Note from the Translator Explanation for the Special Notational Device Chapter 0 Integers,Number Fields and Polynomials Part 1 General Theory of Systems of Linear Equations Introduction Chapter 1 Algebra of Matrices Chapter 2 The Determinant Method for a Special Class of Lin-ear Equations(Cramer's Rule) Chapter 3 General Theory of Systems of Linear Equations Chapter 4 Linear Spaces and Systmes of Linear Equations Chapter 5 Symmetric Bilinear Metric Spaces and Systems of Linear Equations Part 2 The Principal Axes Problem of Real Quadratic Forms Chapter 6 Linear Transformations on Linear Spaces Chapter 7 A Class of Direct Sum Decompositions of Linear Spaces Relative to Linear Transformations Chapter 8 Two Classes of Linear Transformations on Euclidean Spaces and the Principal Axes Problem of Quadr-atic Forms Chapter 9 Further Development——Similarity Canonical Forms of Matrices Bibliography Index