Asymptotic behavior of positively curved steady Ricci Solitons, II
  In this note, we show that any $n$-dimensional $\kappa$-noncollapsed steady K\"ahler-Ricci soliton with nonnegative bisectional curvature must be flat. The result is an improvement to our former work in \cite{DZ2}. 
Yuxing Deng and Xiaohua Zhu
math.DG