Geometric Criterium in the Center Problem
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Abstract
In this paper, we use a geometric criterium based on the classical method of the construction of Lyapunov functions to determine if a differential system has a focus or a center at a singular point. This criterium is proved to be useful for several examples studied in previous works with other more specific methods.
Mathematics Subject Classification
Primary 34C05 Secondary 34C23 37G15Keywords
Nonlinear differential systems integrability problem degenerate center problemPreview
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