2009/09/08 by O. Chis, Chis, O., A. Sandru +3
Mathematics · #37H15 #37L55 #60H20 #65C30 #76M35 #Dynamical Systems (math.DS) #FOS: Mathematics #math.DS #msc:37H15 #msc:37L55 #msc:60H20 #msc:65C30 #msc:76M35
paper · pdf · doi:10.48550/arxiv.0909.1438
23 pages, 30 figures
arxiv created 2009/09/08 · arxiv updated 2009/12/01
In this paper we investigate some stochastic models for tumor-immune systems. To describe these models, we used a Wiener process, as the noise has a stabilization effect. Their dynamics are studied in terms of stochastic stability in the equilibrium points, by constructing the Lyapunov exponent, depending on the parameters that describe the model. Stochastic stability was also proved by constructing a Lyapunov function. We have studied and and analyzed a Kuznetsov-Taylor like stochastic model and a Bell stochastic model for tumor-immune systems. These stochastic models are studied from stability point of view and they were represented using the second Euler scheme and Maple 12 software.