. Let $(X,\omega)$ be a compact Kähler manifold of complex dimension $n$, let $h$ be a smooth function such that $\int_{X}\omega^{n}=\int_{X}e^{h}\omega^{n}$ and $\varphi\in{\cal P}_{\omega}$ a solution of the complex Monge-Ampère equation

$\displaystyle(\omega+i\partial\bar{\partial}\varphi)^{n}=e^{h+\lambda\varphi}\omega^{n}\,,$

(4.5)

$\lambda>0$. Consider also two solutions $\varphi^{\prime}\,\varphi^{\prime\prime}\in{\cal P}_{\omega}$ of the complex Monge-Ampère equation $(\omega+i\partial\bar{\partial}\varphi)^{n}=e^{h}\omega^{n}$ such that $\min_{X}\varphi^{\prime}=0=\max_{X}\varphi^{\prime\prime}$. Then $\varphi^{\prime\prime}\leq\varphi\leq\varphi^{\prime}$.