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Properties of the dominant behaviour of quadratic systems. (English) Zbl 1121.34043

This well-written paper examines a class of first-order quadratic systems of two equations with constant coefficients from both the symmetry and singularity analyses points of view. These equations of Lotka-Volterra-type arise in mathematical modeling and are thus of interest. The relationship between an increase in the number of singularities and the possession of the Painlevé property is pointed out. Moreover, the authors observe that for special values of the parameters of the system the possession of the Painlevé property is characterized by a left Painlevé series rather than the standard right Painlevé series.

MSC:

34C14 Symmetries, invariants of ordinary differential equations
34M55 Painlevé and other special ordinary differential equations in the complex domain; classification, hierarchies
92D25 Population dynamics (general)

Software:

LIE; DIMSYM

References:

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