Definition 10.12.1.72E9AF170CBA For $x\in X$, the minimal multiplicity of $\alpha $ at $x$ is
\[ \nu (\alpha ,x)=\sup _{\varepsilon >0}\nu (T_{\min ,\varepsilon },x). \]
The non-nef locus is
\[ E_{\mathrm{nn}}(\alpha )=\{ x\in X:\nu (\alpha ,x)>0\} . \]
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