Lemma 15.87.3. Let K = (K_ n^\bullet ) be an object of D(\textit{Mod}(\mathbf{N}, (A_ n))). There exists a canonical distinguished triangle
in D(A). In other words, R\mathop{\mathrm{lim}}\nolimits K is a derived limit of the inverse system (K_ n^\bullet ) of D(A), see Derived Categories, Definition 13.34.1.
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