Observation 6.4.7. For \(n < 0\), we have \(\Ext ^n_C(M,N) = 0\), since \(M \in C_{\geq 0}\) while \(N[n] \in C_{\leq n} \subseteq C_{\leq -1}\).
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Stable homotopy theory and higher algebra · Observation 6.4.7
Observation 6.4.7. For \(n < 0\), we have \(\Ext ^n_C(M,N) = 0\), since \(M \in C_{\geq 0}\) while \(N[n] \in C_{\leq n} \subseteq C_{\leq -1}\).
Generated from the authoritative LaTeX source.