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差異太大好像沒什麼好比的欸?最多就多型是 B 範疇裡面的一個 morphism 吧? 這是假設 B 是型別的範疇而 B-indexed category 是整個語言的範疇的語義 |
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這個主題講起來很複雜,要從 signature 然後加上等式理論 到這裡就差不多需要學 topos 了 接到 natural model 的部分我也還沒看 |
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主要希望釐清兩者之間的不同與關係
https://cs.stackexchange.com/questions/120216/why-are-all-polymorphic-functions-between-functors-natural-transformations
https://bartoszmilewski.com/2015/04/07/natural-transformations
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