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In \cite{CJ1} M. Jaoua et al. studied the linear approximation of Robin problem on $\Omega$ an open bounded domain of $\R^d$, and they given some important results. In this paper, we study a nonlinear approximation of an elliptic problem…

Analysis of PDEs · Mathematics 2024-09-26 Jamel Benameur , Chokri Elhechmi

We consider the nonlinear Schr\"{o}dinger equation on the half-line $x \geq 0$ with a Robin boundary condition at $x = 0$ and with initial data in the weighted Sobolev space $H^{1,1}(\mathbb{R}_+)$. We prove that there exists a global weak…

Analysis of PDEs · Mathematics 2022-11-01 Jae Min Lee , Jonatan Lenells

We consider a nonlinear elliptic equation driven by a nonhomogeneous differential operator plus an indefinite potential. On the reaction term we impose conditions only near zero. Using variational methods, together with truncation and…

Analysis of PDEs · Mathematics 2020-06-03 Nikolaos S. Papageorgiou , Vicenţiu D. Rădulescu , Dušan D. Repovš

We deal with the existence of weak solutions for a mixed Neumann-Robin-Cauchy problem. The existence results are based on global-in-time estimates of approximating solutions, and the passage to the limit exploits compactness techniques. We…

Analysis of PDEs · Mathematics 2017-01-11 Luisa Consiglieri

In this paper, we study the existence and the summability of solutions to a Robin boundary value problem whose prototype is the following: $$ \begin{cases} -\text{div}(b(|u|)\nabla u)=f &\text{in }\Omega,\\[.2cm] \displaystyle\frac{\partial…

Analysis of PDEs · Mathematics 2024-07-16 Francesco Della Pietra , Giuseppina di Blasio , Teresa Radice

Several applications in medical imaging and non-destructive material testing lead to inverse elliptic coefficient problems, where an unknown coefficient function in an elliptic PDE is to be determined from partial knowledge of its…

Optimization and Control · Mathematics 2022-12-13 Bastian Harrach

The existence of two nontrivial smooth solutions to a semilinear Robin problem with indefinite unbounded potential and asymmetric nonlinearity $f$ is established. Both crossing and resonance are allowed. A third nonzero solution exists…

Analysis of PDEs · Mathematics 2015-06-09 Giuseppina D'Aguì , Salvatore A. Marano , Nikolaos S. Papageorgiou

We compare the solutions of two one-dimensional Poisson problems on an interval with Robin boundary conditions, one with given data, and one where the data has been symmetrized. When the Robin parameter is positive and the symmetrization is…

Analysis of PDEs · Mathematics 2021-01-26 Jeffrey J. Langford , Patrick McDonald

We deal with a boundary detection problem arising in nondestructive testing of materials. The problem consists in recovering an unknown portion of the boundary, where a Robin condition is satisfied, with the use of a Cauchy data pair…

Numerical Analysis · Mathematics 2013-05-07 Hui Cao , Sergei V. Pereverzev , Eva Sincich

We consider the problem of the recovery of a Robin coefficient on a part $\gamma \subset \partial \Omega$ of the boundary of a bounded domain $\Omega$ from the principal eigenvalue and the boundary values of the normal derivative of the…

Analysis of PDEs · Mathematics 2020-07-08 Matteo Santacesaria , Toshiaki Yachimura

We study the solvability of boundary-value problems for differential-operator equations of the second order in L p (0, 1; X), with 1 < p < +$\infty$, X being a UMD complex Banach space. The originality of this work lies in the fact that we…

Analysis of PDEs · Mathematics 2025-09-18 Angelo Favini , Rabah Labbas , Stéphane Maingot , Alexandre Thorel

Existence and global regularity results for boundary-value problems of Robin type for harmonic and polyharmonic functions in $n$-dimensional half-spaces are offered. The Robin condition on the normal derivative on the boundary of the…

Analysis of PDEs · Mathematics 2024-07-17 Andrea Cianchi , Gael Y. Diebou , Lenka Slavíková

We study a nonlinear Robin problem driven by the $p$-Laplacian and with a reaction term depending on the gradient (the convection term). Using the theory of nonlinear operators of monotone-type and the asymptotic analysis of a suitable…

Analysis of PDEs · Mathematics 2018-07-10 Nikolaos S. Papageorgiou , Vicenţiu D. Rădulescu , Dušan D. Repovš

By means of a suitable weighted rearrangement, we obtain various apriori bounds for the solutions to a Robin problem. Among other things, we derive a family of Faber-Krahn type inequalities.

Analysis of PDEs · Mathematics 2022-07-29 A. Alvino , F. Chiacchio , C. Nitsch , C. Trombetti

We study an inverse boundary value problem in corrosion detection. The model is based on a conductivity equation with nonlinear Robin boundary condition. We prove that the nonlinear Robin term can be identified locally from Cauchy data…

Analysis of PDEs · Mathematics 2026-05-08 David Johansson

In this paper, we present numerical methods to implement the probabilistic representation of third kind (Robin) boundary problem for the Laplace equations. The solution is based on a Feynman-Kac formula for the Robin problem which employs…

Numerical Analysis · Mathematics 2016-10-31 Yijing Zhou , Wei Cai

We generalize the notion of renormalized solution to semilinear elliptic and parabolic equations involving operator associated with general (possibly nonlocal) regular Dirichlet form and smooth measure on the right-hand side. We show that…

Analysis of PDEs · Mathematics 2015-11-10 Tomasz Klimsiak , Andrzej Rozkosz

For a second order formally symmetric elliptic differential expression we show that the knowledge of the Dirichlet-to-Neumann map or Robin-to-Dirichlet map for suitably many energies on an arbitrarily small open subset of the boundary…

Analysis of PDEs · Mathematics 2020-04-22 Jussi Behrndt , Jonathan Rohleder

In this paper we study the behavior of the solutions to the Robin problem in bounded $1$-sided NTA domains with Ahlfors-David regular boundary, generalizing the results of \cite{DavDEMM} to the case of a non constant Robin parameter. In…

Analysis of PDEs · Mathematics 2025-10-28 Svitlana Mayboroda , Alberto Pacati

We write down a Robin boundary term for general relativity. The construction relies on the Neumann result of arXiv:1605.01603 in an essential way. This is unlike in mechanics and (polynomial) field theory, where two formulations of the…

General Relativity and Quantum Cosmology · Physics 2017-09-13 Chethan Krishnan , Shubham Maheshwari , P. N. Bala Subramanian