arXiv subjects
Publications and source records attributed to Robert Stegliński.
We study the existence of infinitely many positive homoclinic solutions to a second-order difference equation on integers with $p_k$-Laplacian. To achieve our goal we use the critical point theory and the general variational principle of Ricceri.
In this paper, we obtain conditions under which the difference equation $-Δ\left( a(k)ϕ_{p}(Δu(k-1))\right) +b(k)ϕ_{p}(u(k))=λf(k,u(k)),\quad k\in \mathbb{Z}$, has infinitely many homoclinic solutions. A variant of the fountain theorem is utilized in the proof of our theorem. It improves the results in [L.Kong, homoclinic solutions for a second order difference equation with $p-$Laplacian, \textit{Appl. Math. Comput}., \textbf{247} (2014), 1113--1121], where the set of conditions imposed on nonlinearity is inconsistent.
In this paper, we determine a concrete interval of positive parameters $λ$, for which we prove the existence of infinitely many homoclinic solutions for a discrete problem $-Δ\left( a(k)ϕ_{p}(Δu(k-1))\right) +b(k)ϕ_{p}(u(k))=λf(k,u(k))$, $k\in Z$; where the nonlinear term $f : Z \times R \rightarrow R$ has an appropriate oscillatory behavior at infinity, without any symmetry assumptions. The approach is based on critical point theory.