RT journal article T1 Increase of power leads to a bilateral solution to a strongly nonlinear elliptic coupled system A1 Ortegón Gallego, Francisco A1 Rhoudaf, Mohamed A1 Talbi, Hajar A2 Matemáticas K1 coupled system K1 bilateral solution K1 nonlinear elliptic equation K1 thermistor problem K1 penalization techniques AB In this paper, we analyze the following nonlinear elliptic problem A (u) = ρ (u) | φ | 2 in ω, div (ρ (u) φ) = 0 in ω, u = 0 on ω, φ = φ 0 on ω. $\begin{cases}A\left(u\right)=\rho \left(u\right)\vert \nabla \varphi {\vert }^{2}\,\text{in}\,{\Omega},\quad \hfill \\ \text{div}\left(\rho \left(u\right)\nabla \varphi \right)=0\,\text{in}\,{\Omega},\quad \hfill \\ u=0\,\text{on}\,\partial {\Omega},\quad \hfill \\ \varphi ={\varphi }_{0}\,\text{on}\,\partial {\Omega}.\quad \hfill \end{cases}$ where A(u) = -diva(x, u, u) is a Leray-Lions operator of order p. The second member of the first equation is only in L 1(ω). We prove the existence of a bilateral solution by an approximation procedure, the keypoint being a penalization technique. PB DE GRUYTER POLAND SN 2169-0375 YR 2024 FD 2024 LK http://hdl.handle.net/10498/33723 UL http://hdl.handle.net/10498/33723 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 11-nov-2026