59.28.4.1

\begin{equation} \label{etale-cohomology-equation-isomorphisms-pairs} \mathit{Isom}_ S((\mathcal{L}, \alpha ), (\mathcal{L}', \alpha ')) = \left\{ \begin{matrix} \emptyset
& \text{if}
& \text{they are not isomorphic}
\\ H^0(S, \mu _{n, S})\cdot \varphi
& \text{if}
& \varphi \text{ isomorphism of pairs}
\end{matrix} \right. \end{equation}

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