Initially, these organizations were introduced to address problems, serving as tools and in an auxiliary status. It was only later that the focus shifted to studying the organizations themselves - in a word, abstract algebra is the study of the 'organization' itself. (I argued that ...
早年我在大学读书时，向老师提出这一问题。当然不是问它的定义，而是说这个词背后是否有什么直观的东西。刚才我查 wiki 时，在页面右方的图下面的文字中看到这样的字句：The word ring is the contraction of Zahlring.然后我赶紧google一下 Zahlring ，就遇到 这里 的页面。人们给出了一些推测 ...
研究生如何自救？（上）
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