$$$$T(v) = \lambda v$$$$

《Linear Algebra Done Right》中是通过一维不变子空间而引出特征值和特征向量的概念的，所以我们要先从不变子空间开始。

$$$$U = \{au:a\in F \}$$$$

$$$$Tu = \lambda u , u \neq 0$$$$

# 参考资料

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