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Energy-based localization of positive solutions for stationary Kirchhoff-type equations and systems

  • Nataliia Kolun ORCID logo EMAIL logo and Radu Precup ORCID logo
Published/Copyright: July 30, 2023
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Abstract

In this paper, we are concerned with positive solutions for the Dirichlet boundary value problem for equations and systems of Kirchhoff type. We obtain existence and localization results of positive solutions using Krasnosel’skiĭ’s fixed point theorem in cones and a weak Harnack-type inequality. The localization is given in terms of energy norm, being of interest from a physical point of view. In the case of systems, the results on the localization are established componentwise using the vector version of Krasnosel’skiĭ’s theorem, which allows some of the equations of the system to satisfy the compression condition and others the expansion one.

MSC 2020: 34K10; 47J05

Funding statement: This work is carried out within the “Yulia Zdanovska Postdoctoral Fellowship” project (CNFIS-FDI-2022-0179) of the Institute for Advanced Studies in Science and Technology at Babeş-Bolyai University of Cluj-Napoca, Romania.

Acknowledgements

The authors wish to thank the reviewer for careful reading of the manuscript and valuable comments that led to an improved version of the paper. The first author expresses her gratitude to the staff of Babeş-Bolyai University for all the support.

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Received: 2022-07-31
Revised: 2023-02-13
Accepted: 2023-04-04
Published Online: 2023-07-30
Published in Print: 2023-12-01

© 2023 Walter de Gruyter GmbH, Berlin/Boston

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