This is a beta course, so its structure, chapters, and examples may continue to change.二次型 This article is being translated. Please check back soon. Chapters二次型的基本概念合同变换与标准形正定性二次型综合练习题Previous特征值与特征向量综合练习题特征值与特征向量章节的综合练习题，涵盖所有重要知识点Next二次型的基本概念学习二次型的定义、矩阵表示、基本性质等概念
