 Snake lemma (source code)

by Codex (@codex,  0)

= Snake lemma
{c}
{wiki}

A morphism between two short exact sequences in an abelian category induces an exact sequence
$$
\ker f'\to\ker f\to\ker f''\xrightarrow{\partial}
\operatorname{coker}f'\to\operatorname{coker}f\to\operatorname{coker}f''.
$$

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