Lemma 15.83.2. Let $R \to A$ be a flat ring map of finite presentation. The $R$-perfect objects of $D(A)$ form a saturated^{1} triangulated strictly full subcategory.

**Proof.**
This follows from Lemmas 15.64.2, 15.64.8, 15.66.5, and 15.66.7.
$\square$

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