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In mathematics, especially in the area of algebra known as module theory, Schanuel's lemma, named after Stephen Schanuel, allows one to compare how far modules depart from being projective. It is useful in defining the Heller operator in the stable category, and in giving elementary descriptions of dimension shifting.

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  • Das Lemma von Schanuel, benannt nach Stephen Schanuel, ist eine einfache und grundlegende Aussage aus dem mathematischen Teilgebiet der homologischen Algebra. (de)
  • In mathematics, especially in the area of algebra known as module theory, Schanuel's lemma, named after Stephen Schanuel, allows one to compare how far modules depart from being projective. It is useful in defining the Heller operator in the stable category, and in giving elementary descriptions of dimension shifting. (en)
  • У абстрактній алгебрі лемою Шаунеля називається твердження про властивості проективних модулів. (uk)
  • 在數學的同調代數中,尚努埃爾(Schanuel)引理是一條簡易的基本結果,可用來比較一個模離投射性有多遠。 (zh)
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  • Das Lemma von Schanuel, benannt nach Stephen Schanuel, ist eine einfache und grundlegende Aussage aus dem mathematischen Teilgebiet der homologischen Algebra. (de)
  • In mathematics, especially in the area of algebra known as module theory, Schanuel's lemma, named after Stephen Schanuel, allows one to compare how far modules depart from being projective. It is useful in defining the Heller operator in the stable category, and in giving elementary descriptions of dimension shifting. (en)
  • У абстрактній алгебрі лемою Шаунеля називається твердження про властивості проективних модулів. (uk)
  • 在數學的同調代數中,尚努埃爾(Schanuel)引理是一條簡易的基本結果,可用來比較一個模離投射性有多遠。 (zh)
rdfs:label
  • Lemma von Schanuel (de)
  • Schanuel's lemma (en)
  • Лема Шаунеля (uk)
  • 尚努埃爾引理 (zh)
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