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从反函数的观点看逆矩阵
加星标,才能不错过每日推送!方法见文末插图 要想让线性代数生动起来,除了介绍一些精彩应用的例子,一个可行的办法是强调几何的语言。所谓几何语言,简单讲,就是用线性变换代替矩阵,用抽象向量代替列向量。代数语言具体清晰,而几何语言直观明快。通常的教科书往往过分强调代数语言,导致思路曲折,概念引入缺乏动机,掩盖了线性代数的本质。 本文从“单射”和“满射”入手,引出反函数概念,采用更直观的方式描述逆矩阵。这 ...
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