Lemma 12.22.2. Let $\mathcal{A}$ be an abelian category. The category of differential objects of $\mathcal{A}$ is abelian.

** The category of differential objects of an abelian category is itself an abelian category. **

**Proof.**
Omitted.
$\square$

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## Comments (1)

Comment #827 by Johan Commelin on