Nodal solutions for the double phase problems

Chao Ji, Nikolaos S. Papageorgiou

We consider a parametric nonautonomous $(p,q)$-equation with unbalanced growth as follows \begin{align*} \left\{ \begin{aligned} &-Δ_p^αu(z)-Δ_q u(z)=λ\vert u(z)\vert^{τ-2}u(z)+f(…