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In this article, we consider a combination of local and nonlocal Laplace equation with singular nonlinearities. For such mixed problems, we establish existence of at least one weak solution for a parameter dependent singular nonlinearity…

Analysis of PDEs · Mathematics 2023-04-28 Prashanta Garain

In this paper we study the normalized solutions of the following critical growth Choquard equation with mixed local and non-local operators: \begin{equation*} \begin{array}{rcl} -\Delta_p u +(-\Delta_p)^s u & = & \lambda |u|^{p-2}u +\mu…

Analysis of PDEs · Mathematics 2026-05-28 J. Giacomoni , Nidhi Nidhi , K. Sreenadh

In this paper we obtain quite general and definitive forms for Hardy-Littlewood type inequalities. Moreover, when restricted to the original particular cases, our approach provides much simpler and straightforward proofs and we are able to…

Functional Analysis · Mathematics 2014-06-24 Nacib Albuquerque , Frédéric Bayart , Daniel Pellegrino , Juan B. Seoane-Sepúlveda

We study a critical problem for an operator of mixed order obtained by the superposition of a Laplacian with a fractional Laplacian. The main novelty is that we consider a mixed operator of the form $-\Delta- \gamma(-\Delta)^s$, namely we…

Analysis of PDEs · Mathematics 2026-01-13 Stefano Biagi , Serena Dipierro , Enrico Valdinoci , Eugenio Vecchi

We investigate the qualitative properties of positive solutions to mixed local-nonlocal equations with indefinite nonlinearities, emphasizing the interaction between classical and fractional Laplacians. We first establish maximum principles…

Analysis of PDEs · Mathematics 2026-04-29 Pengyan Wang , Leyun Wu

We study some critical elliptic problems involving the difference of two nonlocal operators, or the difference of a local operator and a nonlocal operator. The main result is the existence of two nontrivial weak solutions, one with negative…

Analysis of PDEs · Mathematics 2026-03-12 Kanishka Perera , Caterina Sportelli

Recently, great attention has been focused on the study of fractional and non-local operators of elliptic type, both for pure mathematical research and in view of concrete real-world applications. Our problem is related to the fractional…

Analysis of PDEs · Mathematics 2025-06-25 Sana Benhafsia , Rejeb Hadiji

This article concerns about the existence and multiplicity of weak solutions for the following nonlinear doubly nonlocal problem with critical nonlinearity in the sense of Hardy-Littlewood-Sobolev inequality \begin{equation*} \left\{…

Analysis of PDEs · Mathematics 2017-11-09 J. Giacomoni , Tuhina Mukherjee , K. Sreenadh

In this paper, we investigate a mixed elliptic equation involving both local and nonlocal Laplacian operators, with a power-type nonlinearity. Specifically, we consider a Lane-Emden type equation of the form \[-\Delta u + (-\Delta)^s u =…

Analysis of PDEs · Mathematics 2025-07-17 Begoña Barrios , Leandro M. Del Pezzo , Alexander Quaas

We study an elliptic equation, with homogeneous Dirichlet boundary conditions, driven by a mixed type operator (the sum of the Laplacian and the fractional Laplacian), involving a parametric reaction and an undetermined source term.…

Analysis of PDEs · Mathematics 2025-12-02 Antonio Iannizzotto

We consider a singularly perturbed Dirichlet spectral problem for an elliptic operator of second order. The coefficients of the operator are assumed to be locally periodic and oscillating in the scale $\varepsilon$. We describe the leading…

Analysis of PDEs · Mathematics 2016-05-13 Klas Pettersson

We start in this paper a systematic study of the superpositions of elliptic operators with different orders, mixing classical and fractional scenarios. For concreteness, we focus on the sum of the Laplacian and the fractional Laplacian, and…

Analysis of PDEs · Mathematics 2021-10-26 Stefano Biagi , Serena Dipierro , Enrico Valdinoci , Eugenio Vecchi

In this paper we study optimal control problems governed by a semilinear elliptic equation. The equation is nonmonotone due to the presence of a convection term, despite the monotonocity of the nonlinear term. The resulting operator is…

Optimization and Control · Mathematics 2020-06-11 Eduardo Casas , Mariano Mateos , Arnd Rösch

We consider the following nonlinear Choquard equation with Dirichlet boundary condition $$-\Delta u =\left(\int_{\Omega}\frac{|u|^{2_{\mu}^{\ast}}}{|x-y|^{\mu}}dy\right)|u|^{2_{\mu}^{\ast}-2}u+\lambda…

Analysis of PDEs · Mathematics 2016-11-01 Fashun Gao , Minbo Yang

This article deals with a survey of recent developments and results on Choquard equations where we focus on the existence and multiplicity of solutions of the partial differential equations which involve the nonlinearity of convolution…

Analysis of PDEs · Mathematics 2018-11-13 Tuhina Mukherjee , K. Sreenadh

We are concerned with the existence of ground states for nonlinear Choquard equations involving a critical nonlinearity in the sense of Hardy-Littlewood-Sobolev. Our result complements previous results by Moroz and Van Schaftingen where the…

Analysis of PDEs · Mathematics 2016-11-10 Daniele Cassani , Jianjun Zhang

This paper is devoted to study a fractional Choquard problem with slightly subcritical exponents on bounded domains. When the exponent of the convolution type nonlinearity tends to the fractional critical one in the sense of…

Analysis of PDEs · Mathematics 2023-02-07 Marco G. Ghimenti , Min Liu , Zhongwei Tang

In this article, we study the existence/multiplicity results for the following variable order nonlocal Choquard problem with variable exponents (-\Delta)_{p(\cdot)}^{s(\cdot)}u(x)&=\lambda|u(x)|^{\alpha(x)-2}u(x)+…

Analysis of PDEs · Mathematics 2019-07-08 Reshmi Biswas , Sweta Tiwari

This paper deals with fractional Sobolev spaces on a compact Riemannian manifold. We prove a Sobolev inequality in the critical range with an optimal constant for these fractional Sobolev spaces. We use this result to study the existence of…

Analysis of PDEs · Mathematics 2022-09-27 Carolina Rey , Nicolas Saintier

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