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Qualitative analysis of a multimolecules model. (Chinese. English summary) Zbl 0755.92026

Summary: The author studies a multi-molecular model: \[ dx/dt=1-xy^ q,\quad dy/dt=ay(xy^{q-1}-1)\quad (a>0, q\geq 2).\tag{*} \] He obtains the following result: There exists an \(a^*\in(1/(q-1),a_ 0)\) such that if \(a\in(1/(q-1),a^*)\), then (*) has a unique stable limit cycle; if \(a\geq a^*\) or \(a\leq 1/(q-1)\), then (*) has no limit cycle.

MSC:

92E99 Chemistry
34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations