フォドアの補題
1. Fodor's lemmaIn mathematics, particularly in set theory, Fodor's lemma states the following: If is a regular, uncountable cardinal, is a stationary subset of, and is regressive (that is, for any) then there is some and some stationary such that for any . In modern parlance, the nonstationary ideal is normal.
Read “Fodor's lemma” on English Wikipedia
Read “フォドアの補題” on Japanese Wikipedia
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Read “Fodor's lemma” on English Wikipedia
Read “フォドアの補題” on Japanese Wikipedia
Read “Fodor's lemma” on DBpedia
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