The second-order ordinary differential equation
Liénard's Differential Equation
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References
Villari, G. "Periodic Solutions of Liénard's Equation." J. Math. Anal. Appl. 86, 379-386, 1982.Zwillinger, D. Handbook of Differential Equations, 3rd ed. Boston, MA: Academic Press, p. 124, 1997.Referenced on Wolfram|Alpha
Liénard's Differential EquationCite this as:
Weisstein, Eric W. "Liénard's Differential Equation." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LienardsDifferentialEquation.html