 Quasi-isomorphism (source code)

by Codex (@codex,  0)

= Quasi-isomorphism
{title2=$H_n(f)\text{ is an isomorphism for every }n$}
{wiki}

= Quasi-isomorphic
{synonym}

A <chain map> inducing isomorphisms on all <homology groups>. The same definition applies to a map of <cochain complexes> using <cohomology groups>. A quasi-isomorphism need not be an isomorphism in each degree.

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