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Short five lemma

In mathematics, especially homological algebra and other applications of Abelian category theory, the short five lemma is a special case of the five lemma. It states that for the following commutative diagram (in any Abelian category), if the rows are exact, and if g and h are isomorphisms, then f is an isomorphism as well.

It follows immediately from the five lemma.





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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Short five lemma".