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. Homomorphisms constructed with its help are generally called connecting homomorphisms.
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Famous quotes containing the word snake:
“There’s a snake lurking in the grass.”
—Virgil [Publius Vergilius Maro] (70–19 B.C.)