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A Family of Sparse Polynomial Systems Arising in Chemical Reaction Systems

โœ Scribed by Karin Gatermann; Birkett Huber


Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
511 KB
Volume
33
Category
Article
ISSN
0747-7171

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โœฆ Synopsis


The positive steady states of chemical reaction systems modeled by mass action kinetics are investigated. This sparse polynomial system is given by a weighted directed graph and a weighted bipartite graph. In this application the number of real positive solutions within certain affine subspaces of R m is of particular interest. We show that the simplest cases are equivalent to binomial systems and are explained with the help of toric varieties. The argumentation is constructive and suggests algorithms. In general the solution structure is highly determined by the properties of the two graphs. We explain how the graphs determine the Newton polytopes of the system of sparse polynomials and thus determine the solution structure. Results on positive solutions from real algebraic geometry are applied to this particular situation. Examples illustrate the theoretical results.


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