Integrability of Van der Pol-Duffing oscillator system in three-dimensional vector field
MATHEMATICAL METHODS IN THE APPLIED SCIENCES(2022)
摘要
In this work, we focus on studying the integrability of the following three-dimensional Van der Pol-Duffing system (x) over dot =-m(x(3) - mu x - y), (y) over dot = x - y - z, (z) over dot = beta y. More precisely, if m beta not equal 0, then the above system has no analytic and nor Darboux first integrals at the neighborhood of the origin. Also, the stability and instability of the singular points are employed to investigate the C-1 integrability of this type of system.
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关键词
analytic first integrals, Darboux first integrals, exponential factors, invariant algebraic surfaces, 3D Van der Pol-Duffing system
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