Definition 104.5.1. Let \mathcal{X} be an algebraic stack. With notation as above we define the derived category of \mathcal{O}_\mathcal {X}-modules with quasi-coherent cohomology sheaves as the Verdier quotient1
D_\mathit{QCoh}(\mathcal{O}_\mathcal {X}) = D_{\textit{LQCoh}^{fbc}}(\mathcal{O}_\mathcal {X})/ D_{\textit{Parasitic} \cap \textit{LQCoh}^{fbc}}(\mathcal{O}_\mathcal {X})
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