Geodesic
Asymptotic expansions of slow invariant manifolds and reduction of chemical kinetics models
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 52 (2012) no. 1, pp. 81-96

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Methods of the geometric theory of singular perturbations are used to reduce the dimensions of problems in chemical kinetics. The methods are based on using slow invariant manifolds. As a result, the original system is replaced by one on an invariant manifold, whose dimension coincides with that of the slow subsystem. Explicit and implicit representations of slow invariant manifolds are applied. The mathematical apparatus described is used to develop N. N. Semenov’s fundamental ideas related to the method of quasi-stationary concentrations and is used to study particular problems in chemical kinetics. 
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V. A. Sobolev; E. A. Tropkina. Asymptotic expansions of slow invariant manifolds and reduction of chemical kinetics models. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 52 (2012) no. 1, pp. 81-96. http://geodesic.mathdoc.fr/item/ZVMMF_2012_52_1_a7/