Journal
ADVANCES IN APPLIED MATHEMATICS
Volume 44, Issue 2, Pages 168-184Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aam.2009.07.003
Keywords
Chemical reactions; Injectivity; SR graph; Network structure; Multiple equilibria
Categories
Funding
- EPSRC [EP/D060982/1]
- NIH [R01GM086881]
- EPSRC [EP/D060982/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D060982/1] Funding Source: researchfish
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In this paper we discuss the question of how to decide when a general chemical reaction system is incapable of admitting multiple equilibria, regardless of parameter values such as reaction rate constants, and regardless of the type of chemical kinetics, such as mass-action kinetics, Michaelis-Menten kinetics, etc. Our results relate previously described linear algebraic and graph-theoretic conditions for injectivity of chemical reaction systems. After developing a translation between the two formalisms, we show that a graph-theoretic test developed earlier in the context of systems with mass action kinetics, can be applied to reaction systems with kinetics subject only to some weak natural constraints. The test, which is easy to implement algorithmically, and can often be decided without the need for any computation, rules out the possibility of multiple equilibria for the systems in question. (C) 2009 Elsevier Inc. All rights reserved.
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