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arXiv 1211.2153math.DSmath.CA
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一类化学反应网络平衡点的局部和全局稳定性

Local and global stability of equilibria for a class of chemical reaction networks

Pete Donnell, Murad Banaji

摘要:

本文描述了一类化学反应网络,它的正平衡点相对于它所在的化学计量类(一个不变子空间)是局部渐近稳定的.所处理的反应系统的特点主要是存在一定的因子分解的化学计量矩阵,和强连通性的相关图。对反应速率只作了非常温和的假设,特别是没有假设质量作用动力学。在许多情况下,局部渐近稳定性可以扩展到全局渐近稳定性的每个正平衡相对于其化学计量类。通过构造李雅普诺夫函数证明了上述结果,李雅普诺夫函数的存在性是由于反应网络定义了积分递增的单调动力系统.

英文摘要:

A class of chemical reaction networks is described with the property that each positive equilibrium is locally asymptotically stable relative to its stoichiometry class, an invariant subspace on which it lies. The reaction systems treated are characterised primarily by the existence of a certain factorisation of their stoichiometric matrix, and strong connectedness of an associated graph. Only very mild assumptions are made about the rates of reactions, and in particular, mass action kinetics are not assumed. In many cases, local asymptotic stability can be extended to global asymptotic stability of each positive equilibrium relative to its stoichiometry class. The results are proved via the construction of Lyapunov functions whose existence follows from the fact that the reaction networks define monotone dynamical systems with increasing integrals.

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