乔治·布尔发明的工具,叫做"集合论"(set theory).
本次学习资料为 《生活大爆炸the big bang theory》 第七季(最近开始
hrbacek的introduction to set theory.
信夫(yoneda nobuo)提出了范畴论(category theory)的米田引理(yoneda
高宏problemset1
Tips:Do Not Provide
Personal Loans: Go Easy On Your Finances
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