Landau's theorem for p-harmonic mappings in several variables
S-H Chen, Saminathan Ponnusamy, Xiaoyuan Wang · Annales Polonici Mathematici · 2011
A $2p$-times continuously differentiable complex-valued function $f=u+iv$ in a domain $D\subseteq\mathbb{C}$ is $p$-harmonic if $f$ satisfies the $p$-harmonic equation $\varDelta^pf=0$, where $p$ $(\geq 1)$ is a positive integer and $\varDelta$ represents