- 264 名前：現代数学の系譜 雑談 [2022/12/31(土) 23:58:03.85 ID:rNlYJ3SK.net]
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つづき
The theories of first type appeared later and the key example for them was the duality theory for finite groups.[19][20] In this theory the category of finite groups is embedded by the operation {\displaystyle G\mapsto \mathbb {C} _{G}}{\displaystyle G\mapsto \mathbb {C} _{G}} of taking group algebra {\displaystyle \
