Journal
SIAM JOURNAL ON APPLIED MATHEMATICS
Volume 67, Issue 6, Pages 1523-1547Publisher
SIAM PUBLICATIONS
DOI: 10.1137/060673412
Keywords
chemical reactions; P matrices; injectivity; stability; mass action
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In this paper we examine matrices which arise naturally as Jacobians in chemical dynamics. We are particularly interested in when these Jacobians are P matrices ( up to a sign change), ensuring certain bounds on their eigenvalues, precluding certain behavior such as multiple equilibria, and sometimes implying stability. We first explore reaction systems and derive results which provide a deep connection between system structure and the P matrix property. We then examine a class of systems consisting of reactions coupled to an external rate-dependent negative feedback process and characterize conditions which ensure that the P matrix property survives the negative feedback. The techniques presented are applied to examples published in the mathematical and biological literature.
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