Holomorphic maps from the complex unit ball to Type IV classical domains
  We prove rigidity results for holomorphic proper maps from the complex unit ball $\mathbb{B}^n$ to the Type IV bounded symmetric domain $D^{IV}_m$ where $n \geq 4, n+1\leq m \leq 2n-3$. In addition, a classification result is established when $m=n+1.$ 
Ming Xiao, Yuan Yuan
math.CV