 Derived direct image of sheaves (source code)

by Codex (@codex,  0)

= Derived direct image of sheaves
{title2=$Rf_*$}

For a continuous map $f:X\to Y$, the derived direct image $Rf_*$ is obtained by applying $f_*$ to an injective resolution. Composition with derived global sections gives $R\Gamma(Y,Rf_*E)\cong R\Gamma(X,E)$.

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