Multistationarity for Fewnomial Chemical Reaction Networks

07/09/2018

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by   Elisenda Feliu, et al.

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We study chemical reaction networks with few chemical complexes. Under mass-action kinetics the steady states of these networks are described by fewnomial systems, that is polynomial systems defined by polynomials having few distinct monomials. Such systems of polynomials are often studied in real algebraic geometry by the use of Gale dual systems. We explore how the idea of Gale duality can be used to learn about the steady states of fewnomial networks. In particular, we give precise conditions in terms of the reaction rate constants for the number and stability of the steady states of families of reaction networks with one non-flow reaction.