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In this paper we consider quasilinear elliptic equations driven by the variable exponent double phase operator with superlinear right-hand sides. Under very general assumptions on the nonlinearity, we prove a multiplicity result for such…

Analysis of PDEs · Mathematics 2023-08-22 Ángel Crespo-Blanco , Patrick Winkert

This paper is concerned with multiplicity results for parametric singular double phase problems in $\mathbb{R}^N$ via the Nehari manifold approach. It is shown that the problem under consideration has at least two nontrivial weak solutions…

Analysis of PDEs · Mathematics 2021-11-03 Wulong Liu , Patrick Winkert

In this paper we study quasilinear elliptic equations driven by the double phase operator and a right-hand side which has the combined effect of a singular and of a parametric term. Based on the fibering method by using the Nehari manifold…

Analysis of PDEs · Mathematics 2022-03-29 Wulong Liu , Guowei Dai , Nikolaos S. Papageorgiou , Patrick Winkert

The aim of this paper is to extend the Nehari manifold method from the variational setting to the nonvariational framework of fixed point equations. This is achieved by constructing a radial energy functional that generalizes the standard…

Analysis of PDEs · Mathematics 2025-12-09 Radu Precup , Andrei Stan

In this paper, we study a class of double phase systems which contain the singular and mixed nonlinear terms. Unlike the single equation, the mixed nonlinear terms make the problem more complicate. The geometry of the fibering mapping has…

Analysis of PDEs · Mathematics 2025-03-27 Zhanbing Bai , Yizhe Feng

In this present paper, we investigate a new class of singular double phase $p$-Laplacian equation problems with a $\psi$-Hilfer fractional operator combined from a parametric term. Motivated by the fibering method using the Nehari manifold,…

General Mathematics · Mathematics 2023-10-11 J. Vanterler da C. Sousa , Karla B. Lima , Leandro S. Tavares

We study the combined effect of concave and convex nonlinearities on the number of positive solutions for a fractional system involving critical Sobolev exponents. With the help of the Nehari manifold, we prove that the system admits at…

Analysis of PDEs · Mathematics 2016-01-12 Xiaoming He , Marco Squassina , Wenming Zou

This article consists of study of anisotropic double phase problems with singular term and sign changing subcritical as well as critical nonlinearity. Seeking the help of well known Nehari manifold technique, we establish existence of at…

Analysis of PDEs · Mathematics 2022-03-01 Prashanta Garain , Tuhina Mukherjee

In this paper, we study multiplicity results for double phase problems of Kirchhoff type with right-hand sides that include a parametric singular term and a nonlinear term of subcritical growth. Under very general assumptions on the data,…

Analysis of PDEs · Mathematics 2021-11-16 Rakesh Arora , Alessio Fiscella , Tuhina Mukherjee , Patrick Winkert

In this paper, we study a class of quasilinear elliptic equations involving both local and nonlocal operators with variable exponents. The problem exhibits singular nonlinearities along with a subcritical superlinear growth term and a…

Analysis of PDEs · Mathematics 2026-04-08 Shammi Malhotra , Ambesh Kumar Pandey , K. Sreenadh

In this paper we study quasilinear elliptic equations driven by the so-called double phase operator and with a nonlinear boundary condition. Due to the lack of regularity, we prove the existence of multiple solutions by applying the Nehari…

Analysis of PDEs · Mathematics 2020-11-17 Leszek Gasinski , Patrick Winkert

In the present paper, we study a double-phase variable exponent problem which is set up within a variational framework including a singular potential of fractional-Hardy-type. We employ the Mountain-Pass theorem and the strong minimum…

Analysis of PDEs · Mathematics 2026-04-02 Mustafa Avci

We study the existence of positive solutions for a class of double phase Dirichlet equations which have the combined effects of a singular term and of a parametric superlinear term. The differential operator of the equation is the sum of a…

Analysis of PDEs · Mathematics 2021-05-17 Nikolaos S. Papageorgiou , Dušan D. Repovš , Calogero Vetro

In this article using Nehari manifold method we study the multiplicity of solutions of the following nonlocal elliptic system involving variable exponents and concave-convex nonlinearities: \begin{equation*} \;\;\; \begin{array}{rl}…

Analysis of PDEs · Mathematics 2020-04-21 Reshmi Biswas , Sweta Tiwari

This paper is concerned with variational continuation of branches of solutions for nonlinear boundary value problems, which involve the p-Laplacian, the indefinite nonlinearity, and depend on the real parameter $\lambda$. A special focus is…

Analysis of PDEs · Mathematics 2019-06-06 Yavdat Il'yasov , Kaye Silva

This paper is dedicated to studying the existence of nontrivial positive solutions for a Kirchhoff-type problem with sign change nonlinearities and a singular term, Using the Nehari manifold and EkelandS variational principle we prove that…

Analysis of PDEs · Mathematics 2025-10-10 Djamel Abid

In this paper, we deal with equations of variational form which Nahari manifolds can contain more than two different types of critical points. We introduce a method of separating critical points on the Nahari manifold, based on the use of…

Analysis of PDEs · Mathematics 2019-06-20 Marcos L. M. Carvalho , Yavdat Sh. Il'yasov , Carlos Alberto Santos

The aim of this paper is to study existence results for a singular problem involving the $p$-biharmonic operator and the Hardy potential. More precisely, by combining monotonicity arguments with the variational method, the existence of…

Analysis of PDEs · Mathematics 2024-07-09 A. Drissi , A. Ghanmi , D. D. Repovš

We prove the existence, multiplicity, and bifurcation of solutions with prescribed energy for a broad class of scaled problems by introducing a suitable notion of scaling based Nehari manifold. Applications are given to…

Analysis of PDEs · Mathematics 2025-03-19 Kanishka Perera , Kaye Silva

We study the following singular problem involving the p$(x)$-Laplace operator $\Delta_{p(x)}u= div(|\nabla u|^{p(x)-2}\nabla u)$, where $p(x)$ is a nonconstant continuous function, \begin{equation} \nonumber {{(\rm P_\lambda)}}…

Analysis of PDEs · Mathematics 2022-12-20 Dušan D. Repovš , Kamel Saoudi
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