Lemma 15.96.2. Let $f \in A$ be a nonzerodivisor of a ring $A$. Let $u \in A$ be a unit. Let $M^\bullet $ be a bounded complex of finite free $A$-modules. Then $I_ i(M^\bullet , f) = I_ i(M^\bullet , uf)$.

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

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