Small amplitude limit cycles for the polynomial Liénard system
نویسنده
چکیده
We prove a quadratic in m and n estimate for the maximal number of limit cycles bifurcating from a focus for the Liénard equation x+f(x) _ x+ g(x) = 0; where f and g are polynomials of degree m and n respectively. In the proof we use a bound for the number of double points of a rational a¢ ne curve.
منابع مشابه
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