Polyharmonic Kirchhoff type equations with singular exponential nonlinearities

TL;DR

This paper investigates the existence of solutions for a class of polyharmonic Kirchhoff equations with singular exponential nonlinearities, employing variational methods and concentration compactness principles.

Contribution

It introduces new existence and multiplicity results for solutions to complex nonlinear PDEs with singular exponential growth and Kirchhoff-type nonlocal terms.

Findings

Existence of nontrivial solutions via mountain pass theorem.

Solutions exist under critical exponential growth conditions.

Multiplicity results using Nehari manifold techniques.

Abstract

\noi In this article, we study the existence of non-negative solutions of the following polyharmonic Kirchhoff type problem with critical singular exponential nolinearity $$ \quad \left\{ \begin{array}{lr} \quad -M\left(\displaystyle\int_\Omega |\nabla^m u|^{\frac{n}{m}}dx\right)\Delta_{\frac{n}{m}}^{m} u = \frac{f(x,u)}{|x|^\alpha} \; \text{in}\; \Om{,} \quad \quad u = \nabla u=\cdot\cdot\cdot= {\nabla}^{m-1} u=0 \quad \text{on} \quad \partial \Om{,} \end{array} \right. $$ where $\Om\subset \mb R^n$ is a bounded domain with smooth boundary, $n\geq 2m\geq 2$ and $f(x,u)$ behaves like $e^{|u|^{\frac{n}{n-m}}}$ as $|u|\ra\infty$. Using mountain pass structure and {the} concentration compactness principle, we show the existence of a nontrivial solution. %{OR}\\ In the later part of the paper, we also discuss the above problem with convex-concave type sign changing nonlinearity. Using {the} Nehari manifold technique, we show the existence and multiplicity of non-negative solutions. \medskip