On the Extension of the Stability of the Trivial Solution of Equation ẍ+aẍ+bẍ+φ(x)ẋ+d·x=0
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Graphical Abstract
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Abstract
In this paper, by means of the method of constructing Lyapunov functions of nonlinear systems, the asymptotic stability of the trivial solution of three more generalized four-order nonlinear equations is discussed in a wide range and results in paper(1) are thus extended.
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