On entire solutions for a class of product-type nonlinear PDEs in $\mathbb{C}^n$

This paper is mainly devoted to describing the entire solutions of nonlinear partial differential equation $$u_{z_1}u_{z_2}\cdots u_{z_n}=e^g,$$ with the eikonal equation as a prototype, where $g$ is a polynomial in $\mathbb{C}^n$. Through a novel method, we break through the restriction of finite order condition and present the explicit expressions for the entire solution of the above equation. As an application, we completely resolve two questions of Xu-Liu-Xuan in \cite{Xu}.