I'd like a closed form solution for $E(X1 | X2 > X3)$$E(X_1 \mid X_2 > X_3)$ where $(X1, X2, X3)$$(X_1, X_2, X_3)$ is multivariate normal with possibly arbitrary mean vector and covariance matrix.
The conditional distribution $f(X1 | X2, X3)$$f(X_1 \mid X_2, X_3)$ is easy to get in closed form, but I am not sure if there is a closed-form solution to handling conditioning on the event $X2 > X3$$X_2 > X_3$. Any help would be appreciated!