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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Effaceable functor ： ウィキペディア英語版 Effaceable functor In mathematics, an effaceable functor is an additive functor ''F'' between abelian categories ''C'' and ''D'' for which, for each object ''A'' in ''C'', there exists a monomorphism $u:\; A\; \backslash to\; M$, for some ''M'', such that $F(u)\; =\; 0$. Similarly, a coeffaceable functor is one for which, for each ''A'', there is an epimorphism into ''A'' that is killed by ''F''. The notions were introduced in Grothendieck's Tohoku paper. A theorem of Grothendieck says that every effaceble δ-functor (i.e., effaceable in each degree) is universal. == Further reading == *http://math.stackexchange.com/questions/44382/meaning-of-efface-in-effaceable-functor-and-injective-effacement 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Effaceable functor」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.