The analysis of stochastic stability of stochastic models that describe tumor-immune systems

Details The analysis of stochastic stability of stochastic models that describe tumor-immune systems The analysis of stochastic stability of stochastic models that describe tumor-immune systems

2009-09-08

arxiv.org/abs/0909.1438v1

Mathematics

Dynamical Systems

23 pages, 30 figures

Scientific paper

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.

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