Lemma 13.6.9. Let \mathcal{D} be a triangulated category. Let \mathcal{B} be a full triangulated subcategory. The kernel of the quotient functor Q : \mathcal{D} \to \mathcal{D}/\mathcal{B} is the strictly full subcategory of \mathcal{D} whose objects are
In other words it is the smallest strictly full saturated triangulated subcategory of \mathcal{D} containing \mathcal{B}.
Comments (1)
Comment #331 by arp on
There are also: