第6章 二次型············································································································· 131 §6.1 二次型与对称矩阵························································································· 131 习题6.1················································································································· 133 §6.2 二次型的标准形····························································································· 134 习题6.2················································································································· 142 §6.3 二次型的有定性····························································································· 142 习题6.3················································································································· 148 综合练习6············································································································· 149 参考文献······················································································································ 150

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