Isochronous rate equations describing chemical reactions

Calogero, Francesco, Leyvraz, François and Sommacal, Matteo (2010) Isochronous rate equations describing chemical reactions. Journal of Physics A: Mathematical and Theoretical, 43 (43). p. 434010. ISSN 1751-8113

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We consider systems of ordinary differential equations in the plane featuring at most quadratic nonlinearities. It is known that, up to linear transformations of the variables, there are only four systems for which the origin is an isochronous center, that is, for which all orbits in the vicinity of the origin are periodic with the same, fixed period. On the other hand, if, after an affine transformation, the system's coefficients satisfy certain positivity requirements, these systems can be interpreted as kinetic equations for chemical reactions. Here we show that, for two of these four isochronous systems, it is possible to find an affine transformation such that the transformed system obeys all these positivity conditions. For the third we can show that this is not possible, whereas for the fourth the issue remains to some extent open. Hence for the two cases mentioned above these systems may be interpreted as kinetic equations describing isochronous chemical reactions.

Item Type: Article
Subjects: G100 Mathematics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Ay Okpokam
Date Deposited: 24 Jan 2012 16:39
Last Modified: 12 Oct 2019 22:54

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