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arXiv 2008.11468math.AGmath.DS
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反应网络的环面动力系统模空间的结构

The structure of the moduli space of toric dynamical systems of a reaction network

Gheorghe Craciun, Jiaxin Jin, Miruna-Stefana Sorea

AI总结:

本文研究反应网络生成的环面动力系统模空间(环面轨迹)的拓扑结构,证明其与复平衡通量向量集和仿射不变多面体的乘积同胚,从而是可缩流形,且在双射仿射变换下不变。

摘要:

我们研究环面动力系统,这类系统也被称为复平衡质量作用系统。它们是一类具有显著稳定性的多项式动力系统,产生于对反应网络数学模型的分析:在质量作用动力学假设下,这些模型可以产生复平衡态。给定一个反应网络,我们研究由该网络生成的环面动力系统的模空间,该模空间也被称为网络的环面轨迹(toric locus)。环面轨迹是一个代数簇,我们尤其关注其拓扑性质。我们证明复平衡态连续依赖于环面轨迹中的参数值,并利用这一结果证明环面轨迹具有一种显著的产品结构:它与复平衡通量向量集合和网络的仿射不变多面体的乘积同胚。特别地,由此可知环面轨迹是一个可缩流形。最后,我们证明环面轨迹在生成反应网络的双射仿射变换下保持不变。

英文摘要:

We consider toric dynamical systems, which are also called complex-balanced mass-action systems. These are remarkably stable polynomial dynamical systems that arise from the analysis of mathematical models of reaction networks when, under the assumption of mass-action kinetics, they can give rise to complex-balanced equilibria. Given a reaction network, we study the moduli space of toric dynamical systems generated by this network, also called the toric locus of the network. The toric locus is an algebraic variety, and we are especially interested in its topological properties. We show that complex-balanced equilibria depend continuously on the parameter values in the toric locus, and, using this result, we prove that the toric locus has a remarkable product structure: it is homeomorphic to the product of the set of complex-balanced flux vectors and the affine invariant polyhedron of the network. In particular, it follows that the toric locus is a contractible manifold. Finally, we show that the toric locus is invariant with respect to bijective affine transformations of the generating reaction network.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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