68.11.0.1

\begin{equation} \label{spaces-cohomology-equation-base-change-diagram} \vcenter { \xymatrix{ \mathcal{F}' = (g')^*\mathcal{F} & X' \ar[r]_{g'} \ar[d]_{f'} & X \ar[d]^ f & \mathcal{F} \\ Rf'_*\mathcal{F}' & Y' \ar[r]^ g & Y & Rf_*\mathcal{F} } } \end{equation}

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