A New Approach to the Existence of Quasiperiodic Solutions for Second-Order Asymmetric p-Laplacian Differential Equations

For p≥2 and ϕp(s):=sp-2s, we propose a new estimate approach to study the existence of Aubry-Mather sets and quasiperiodic solutions for the second-order asymmetric p-Laplacian differential equations ϕpx′′+λϕp(x+)-μϕp(x-)=ψ(t,x), where λ and μ are two positive constants satisfying λ-1/p+μ-1/p=2/ω with ω∈R+, ψ(t,x)∈C0,1(Sp×R) is a continuous function, 2πp-periodic in the first argument and continuously differentiable in the second one, x±=max⁡{±x,0}, πp=2π(p-1)1/p/psin⁡π/p, and Sp=R/2πpZ. Using the Aubry-Mather theorem given by Pei, we obtain the existence of Aubry-Mather sets and quasiperiodic solutions under some reasonable conditions. Particularly, the advantage of our approach is that it not only gives a simpler estimation procedure, but also weakens the smoothness assumption on the function ψ(t,x) in the existing literature.