三小时工作，八小时休息，剩下的十三小时留给自己
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Uncombinatorial Abstract Algebra
摘要：本来试图写Combinatorial Abstract Algebra，然而抽代实在太奥妙重重了，于是在弃疗后笔记变成了现在的样子。
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实用抽象代数笔记
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