Local Bifurcations of the Enzyme-Catalyzed Reaction Comprising a Branched Network

Author:

Zhang Qiuyan12,Liu Lingling3,Zhang Weinian1

Affiliation:

1. Department of Mathematics, Sichuan University, Chengdu, Sichuan 610064, P. R. China

2. Chengdu College of University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, P. R. China

3. School of Sciences, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China

Abstract

An enzyme-catalyzed reaction system with four parameters a, b, c, κ is discussed. The system can be reduced to a quartic polynomial differential system with four parameters, which leads to difficulties in the computation of semi-algebraic systems of large degree polynomials. Those systems have to be discussed on subsets of special biological sense, none of which is closed under operations of the polynomial ring. In this paper, we overcome those difficulties to determine the exact number of equilibria and their qualitative properties. Moreover, we obtain parameter conditions for all codimension-1 bifurcations such as saddle-node, transcritical, pitchfork and Hopf bifurcations. We compute varieties of Lyapunov quantities under the limitations of biological requirements and prove that the weak focus is of at most order 2. We further obtain parameter conditions for exact number of limit cycles arising from Hopf bifurcations.

Publisher

World Scientific Pub Co Pte Lt

Subject

Applied Mathematics,Modeling and Simulation,Engineering (miscellaneous)

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Bifurcation Analysis of an Enzyme Reaction System with General Power of Autocatalysis;International Journal of Bifurcation and Chaos;2019-06-15

2. Global Dynamics of an Enzyme-Catalyzed Reaction System;Bulletin of the Malaysian Mathematical Sciences Society;2019-05-30

3. Local bifurcations of an enzyme-catalyzed reaction system with cubic rate law;Nonlinear Dynamics;2018-05-31

4. Bogdanov-Takens bifurcations in the enzyme-catalyzed reaction comprising a branched network;Mathematical Biosciences and Engineering;2017-05

5. Bifurcation analysis of an enzyme-catalyzed reaction system with branched sink;Discrete & Continuous Dynamical Systems - B;2017

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