Schanuel's lemma (Q1816943)
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lemma stating that, given two short exact sequences of R-modules K→P→M and K′→P′→M, if P and P′ are projective, then K⊕P′ is isomorphic to K′⊕P.
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Schanuel's lemma |
lemma stating that, given two short exact sequences of R-modules K→P→M and K′→P′→M, if P and P′ are projective, then K⊕P′ is isomorphic to K′⊕P. |
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Wikipedia(4 entries)
- dewiki Lemma von Schanuel
- enwiki Schanuel's lemma
- ukwiki Лема Шаунеля
- zhwiki 尚努埃爾引理