Lemma 36.9.4. In Situation 36.9.1. Let $\mathcal{F}^\bullet $ be a complex of quasi-coherent $\mathcal{O}_ X$-modules. Then there is a canonical isomorphism

in $D(A)$ functorial in $\mathcal{F}^\bullet $.

Lemma 36.9.4. In Situation 36.9.1. Let $\mathcal{F}^\bullet $ be a complex of quasi-coherent $\mathcal{O}_ X$-modules. Then there is a canonical isomorphism

\[ \text{Tot}(\check{\mathcal{C}}_{alt}^\bullet (\mathcal{U}, \mathcal{F}^\bullet )) \longrightarrow R\Gamma (U, \mathcal{F}^\bullet ) \]

in $D(A)$ functorial in $\mathcal{F}^\bullet $.

**Proof.**
Let $\mathcal{B}$ be the set of affine opens of $U$. Since the higher cohomology groups of a quasi-coherent module on an affine scheme are zero (Cohomology of Schemes, Lemma 30.2.2) this is a special case of Cohomology, Lemma 20.40.2.
$\square$

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