Equation 17.10.21D0FE4F9BEB1B

\begin{equation} \begin{split} \varphi _ t=\operatorname *{sup}_{}{}\! {}^{*}& \left\{ \psi _ t: (\psi _{s})_ s \textup{ is a subgeodesic from }\psi _0\textup{ to }\psi _1,\right.\\ & \psi _0,\psi _1\in \mathrm{PSH}(X,\theta ),\left.\psi _0\leq \varphi _0,\psi _1\leq \varphi _1\right\} . \end{split} \end{equation}