The Nehari manifold method for a class of logistic equations with sign-changing weights and an interior interface-type boundary condition

Abstract This paper investigates the existence of solutions for the following class of coupled systems of partial differential equations with an interface condition <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:mrow> <m:mo>{</m:mo> <m:mtable columnspacing="0pt" displaystyle="true" rowspacing="0pt"> <m:mtr> <m:mtd columnalign="right"> <m:mrow> <m:mo>-</m:mo> <m:mrow> <m:mi mathvariant="normal">Δ</m:mi> <m:mo>⁢</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> </m:mrow> </m:mtd> <m:mtd columnalign="left"> <m:mrow> <m:mi/> <m:mo>=</m:mo> <m:mrow> <m:mrow> <m:msub> <m:mi>λ</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>⁢</m:mo> <m:msub> <m:mi>a</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>⁢</m:mo> <m:mrow> <m:mo stretchy="false">(</m:mo> <m:mi>x</m:mi> <m:mo stretchy="false">)</m:mo> </m:mrow> <m:mo>⁢</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> <m:mo>+</m:mo> <m:mrow> <m:msub> <m:mi>b</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>⁢</m:mo> <m:mrow> <m:mo stretchy="false">(</m:mo> <m:mi>x</m:mi> <m:mo stretchy="false">)</m:mo> </m:mrow> <m:mo>⁢</m:mo> <m:msup> <m:mrow> <m:mo stretchy="false">|</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo stretchy="false">|</m:mo> </m:mrow> <m:mrow> <m:msub> <m:mi>p</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>-</m:mo> <m:mn>2</m:mn> </m:mrow> </m:msup> <m:mo>⁢</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> </m:mrow> </m:mrow> </m:mtd> <m:mtd/> <m:mtd columnalign="right"> <m:mrow> <m:mrow> <m:mtext>in </m:mtext> <m:msub> <m:mi mathvariant="normal">Ω</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> <m:mo>,</m:mo> </m:mrow> </m:mtd> </m:mtr> <m:mtr> <m:mtd columnalign="right"> <m:mrow> <m:msub> <m:mo>∂</m:mo> <m:mi>ν</m:mi> </m:msub> <m:mo>⁡</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> </m:mtd> <m:mtd columnalign="left"> <m:mrow> <m:mi/> <m:mo>=</m:mo> <m:mrow> <m:mi>γ</m:mi> <m:mo>⁢</m:mo> <m:mrow> <m:mo stretchy="false">(</m:mo> <m:mrow> <m:msub> <m:mi>u</m:mi> <m:mn>2</m:mn> </m:msub> <m:mo>-</m:mo> <m:msub> <m:mi>u</m:mi> <m:mn>1</m:mn> </m:msub> </m:mrow> <m:mo stretchy="false">)</m:mo> </m:mrow> </m:mrow> </m:mrow> </m:mtd> <m:mtd/> <m:mtd columnalign="right"> <m:mrow> <m:mrow> <m:mtext>on </m:mtext> <m:mi mathvariant="normal">Σ</m:mi> </m:mrow> <m:mo>,</m:mo> </m:mrow> </m:mtd> </m:mtr> <m:mtr> <m:mtd columnalign="right"> <m:mrow> <m:msub> <m:mo>∂</m:mo> <m:mi>η</m:mi> </m:msub> <m:mo>⁡</m:mo> <m:msub> <m:mi>u</m:mi> <m:mn>2</m:mn> </m:msub> </m:mrow> </m:mtd> <m:mtd columnalign="left"> <m:mrow> <m:mi/> <m:mo>=</m:mo> <m:mn>0</m:mn> </m:mrow> </m:mtd> <m:mtd/> <m:mtd columnalign="right"> <m:mrow> <m:mtext>on </m:mtext> <m:mi mathvariant="normal">Γ</m:mi> <m:mtext>,</m:mtext> </m:mrow> </m:mtd> </m:mtr> </m:mtable> </m:mrow> </m:math> \left\{\begin{aligned} \displaystyle{}{-}\Delta u_{i}&amp;\disp

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Journal
Advances in Calculus of Variations
Published
2026-04-20
DOI
https://doi.org/10.1515/acv-2025-0123
Primary Topic
Nonlinear Partial Differential Equations
Type
article
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article

The Nehari manifold method for a class of logistic equations with sign-changing weights and an interior interface-type boundary condition

Patrizia Pucci, Braulio B. V. Maia, Olímpio H. Myagaki, Eudes M. Barboza
Advances in Calculus of Variations
Nonlinear Partial Differential Equations
article

The Nehari manifold method for a class of logistic equations with sign-changing weights and an interior interface-type boundary condition

Patrizia Pucci, Braulio B. V. Maia, Olímpio H. Myagaki, Eudes M. Barboza
article en

Abstract

Abstract This paper investigates the existence of solutions for the following class of coupled systems of partial differential equations with an interface condition <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:mrow> <m:mo>{</m:mo> <m:mtable columnspacing="0pt" displaystyle="true" rowspacing="0pt"> <m:mtr> <m:mtd columnalign="right"> <m:mrow> <m:mo>-</m:mo> <m:mrow> <m:mi mathvariant="normal">Δ</m:mi> <m:mo>⁢</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> </m:mrow> </m:mtd> <m:mtd columnalign="left"> <m:mrow> <m:mi/> <m:mo>=</m:mo> <m:mrow> <m:mrow> <m:msub> <m:mi>λ</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>⁢</m:mo> <m:msub> <m:mi>a</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>⁢</m:mo> <m:mrow> <m:mo stretchy="false">(</m:mo> <m:mi>x</m:mi> <m:mo stretchy="false">)</m:mo> </m:mrow> <m:mo>⁢</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> <m:mo>+</m:mo> <m:mrow> <m:msub> <m:mi>b</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>⁢</m:mo> <m:mrow> <m:mo stretchy="false">(</m:mo> <m:mi>x</m:mi> <m:mo stretchy="false">)</m:mo> </m:mrow> <m:mo>⁢</m:mo> <m:msup> <m:mrow> <m:mo stretchy="false">|</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo stretchy="false">|</m:mo> </m:mrow> <m:mrow> <m:msub> <m:mi>p</m:mi> <m:mi>i</m:mi> </m:msub> <m:mo>-</m:mo> <m:mn>2</m:mn> </m:mrow> </m:msup> <m:mo>⁢</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> </m:mrow> </m:mrow> </m:mtd> <m:mtd/> <m:mtd columnalign="right"> <m:mrow> <m:mrow> <m:mtext>in </m:mtext> <m:msub> <m:mi mathvariant="normal">Ω</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> <m:mo>,</m:mo> </m:mrow> </m:mtd> </m:mtr> <m:mtr> <m:mtd columnalign="right"> <m:mrow> <m:msub> <m:mo>∂</m:mo> <m:mi>ν</m:mi> </m:msub> <m:mo>⁡</m:mo> <m:msub> <m:mi>u</m:mi> <m:mi>i</m:mi> </m:msub> </m:mrow> </m:mtd> <m:mtd columnalign="left"> <m:mrow> <m:mi/> <m:mo>=</m:mo> <m:mrow> <m:mi>γ</m:mi> <m:mo>⁢</m:mo> <m:mrow> <m:mo stretchy="false">(</m:mo> <m:mrow> <m:msub> <m:mi>u</m:mi> <m:mn>2</m:mn> </m:msub> <m:mo>-</m:mo> <m:msub> <m:mi>u</m:mi> <m:mn>1</m:mn> </m:msub> </m:mrow> <m:mo stretchy="false">)</m:mo> </m:mrow> </m:mrow> </m:mrow> </m:mtd> <m:mtd/> <m:mtd columnalign="right"> <m:mrow> <m:mrow> <m:mtext>on </m:mtext> <m:mi mathvariant="normal">Σ</m:mi> </m:mrow> <m:mo>,</m:mo> </m:mrow> </m:mtd> </m:mtr> <m:mtr> <m:mtd columnalign="right"> <m:mrow> <m:msub> <m:mo>∂</m:mo> <m:mi>η</m:mi> </m:msub> <m:mo>⁡</m:mo> <m:msub> <m:mi>u</m:mi> <m:mn>2</m:mn> </m:msub> </m:mrow> </m:mtd> <m:mtd columnalign="left"> <m:mrow> <m:mi/> <m:mo>=</m:mo> <m:mn>0</m:mn> </m:mrow> </m:mtd> <m:mtd/> <m:mtd columnalign="right"> <m:mrow> <m:mtext>on </m:mtext> <m:mi mathvariant="normal">Γ</m:mi> <m:mtext>,</m:mtext> </m:mrow> </m:mtd> </m:mtr> </m:mtable> </m:mrow> </m:math> \left\{\begin{aligned} \displaystyle{}{-}\Delta u_{i}&amp;\disp

Advances in Calculus of Variations
Universidade Federal de São Carlos (BR), University of Perugia (IT), Universidade Federal Rural da Amazônia (BR), Universidade Federal Rural de Pernambuco (BR)
Openalex Percentile: Top 4%
Nonlinear Partial Differential Equations
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