Snake lemma

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Notion

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Science and technology

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What Wikipedia says

The snake lemma is a tool used in mathematics, particularly homological algebra, to construct long exact sequences. The snake lemma is valid in every abelian category and is a crucial tool in homological algebra and its applications, for instance in algebraic topology.

Excerpt from the Wikipedia article “Snake lemma”, under the CC BY-SA 4.0 license. Read the article on Wikipedia