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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

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 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 quasilinear elliptic Kirchhoff equations driven by a non-homogeneous operator with unbalanced growth and right-hand sides that consist of sub-linear, possibly singular, and super-linear reaction terms. Under very…

Analysis of PDEs · Mathematics 2025-10-31 Umberto Guarnotta , Patrick Winkert

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

In this paper, we study a new class of mixed double phase problems that combine local and nonlocal operators. We consider two different models. The first model is driven by the fractional $p$-Laplacian together with a local double phase…

Analysis of PDEs · Mathematics 2026-05-26 Anupma Arora , Shilpa Gupta , Patrick Winkert

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

This paper is concerned with a singular multi-phase problem with variable singularities. The main tool used is the Nehari manifold approach. Existence of at least two positive solutions with positive-negative energy levels are obtained.

Analysis of PDEs · Mathematics 2025-02-17 Mustafa Avci

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 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 this work, we establish the existence and multiplicity of weak solutions for nonlocal elliptic problems driven by the fractional $\Phi$-Laplacian operator, in the presence of a sign-indefinite nonlinearity. More specifically, we…

Analysis of PDEs · Mathematics 2025-07-22 L. R. S. de Assis , M. L. M. Carvalho , Edcarlos D. Silva , A. Salort

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

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

The purpose of this paper is to study a class of double phase problems, with a singular term and a superlinear parametric term on the right-hand side. Using the method of Nehari manifold combined with the fibering maps, we prove that for…

Analysis of PDEs · Mathematics 2022-01-05 Ahmed Aberqi , Jaouad Bennouna , Omar Benslimane , Maria Alessandra Ragusa

In this article, we study the existence and multiplicity of non-negative solutions of following $p$-fractional equation: $$ \quad \left\{\begin{array}{lr}\ds \quad - 2\int_{\mb R^n}\frac{|u(y)-u(x)|^{p-2}(u(y)-u(x))}{|x-y|^{n+p\al}} dxdy =…

Analysis of PDEs · Mathematics 2015-10-06 Sarika goyal , K. Sreenadh

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

We study a $p$-Laplacian equation involving a parameter $\lambda$ and a concave-convex nonlinearity containing a weight which can change sign. By using the Nehari manifold and the fibering method, we show the existence of two positive…

Analysis of PDEs · Mathematics 2019-06-06 Kaye Silva , Abiel Macedo

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

This paper is divided in two parts. In the first part, we prove coercivity results and minimization of the Euler energy functional. In the second part, we focus on the existence and multiplicity of a positive solution of fractional…

General Mathematics · Mathematics 2023-11-21 J. Vanterler da C. Sousa , D. S. Oliveira , Ravi P. Agarwal

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
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