Mean Exit Time and Escape Probability for a Tumor Growth System under   Non-Gaussian Noise
  Effects of non-Gaussian $\alpha-$stable L\'evy noise on the Gompertz tumor growth model are quantified by considering the mean exit time and escape probability of the cancer cell density from inside a safe or benign domain. The mean exit time and escape probability problems are formulated in a differential-integral equation with a fractional Laplacian operator. Numerical simulations are conducted to evaluate how the mean exit time and escape probability vary or bifurcates when $\alpha$ changes. Some bifurcation phenomena are observed and their impacts are discussed. 
Jian Ren, Chujin Li, Ting Gao, Xingye Kan and Jinqiao Duan
math.DS physics.bio-ph q-bio.OT