Corollary 10.18.5.A786309EB514 Assume $b>0$ and that $D_ p$ has a smooth maximizing sequence $(T_ j)$ with uniformly integrable densities $p k_{T_ j}$. Let $u\in \mathrm{PSH}(X,\omega )$ be a threshold subsolution for $f$, and suppose that $\omega +\mathrm{dd}^{\mathrm{c}}u\geq [E]$ for an effective real divisor $E$ whose Bott–Chern class is nef. Let $\beta _ E$ be any smooth closed representative of that class. Then for every smooth strictly positive probability measure $\mu $, the Gauduchon root volume of definition 12.2.1 satisfies
Corollary 10.18.5A786309EB514
\[ \lambda _\mu (\beta _ E)=0. \]
Proof. By proposition 10.18.1, there is a maximizing current $T\in \mathscr G_\omega $ with $\int _ X\beta _ E\wedge T=0$. If $\lambda _\mu (\beta _ E)>0$, then proposition 12.34.2 gives $\Gamma _0(T)=0$, hence $D_{f^{1/n}}(T)=0$, contradicting the positivity of its maximal value. Since the nef class of $\beta _ E$ has $\lambda _\mu (\beta _ E)\geq 0$, the conclusion follows for each $\mu $. $\square$
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