INVESTIGADORES
LEDERMAN Claudia Beatriz
artículos
Título:
An inhomogeneous minimization problem for the p(x)-Laplacian with free boundary
Autor/es:
LEDERMAN, CLAUDIA; WOLANSKI, NOEMÍ
Revista:
Matemática Aplicada Computacional e Industrial
Editorial:
Asociación Argentina de Matemática Aplicada, Computacional e Industrial
Referencias:
Lugar: Santa Fé; Año: 2015 vol. 5 p. 321 - 324
ISSN:
2314-3282
Resumen:
We present results for the problem of minimizing $\displaystyle\int_\Omega\Big(\frac{|\nabla v|^{p_{\varepsilon}(x)}}{p_{\varepsilon}(x)}+B_{\varepsilon}(v)+f^{{\varepsilon}}v\Big)\, dx$ in the class of functions $v\in W^{1,p_{\varepsilon}(\cdot)}(\Omega)$ with $v-\phi_\varepsilon \in W_0^{1,p_{\varepsilon}(\cdot)}(\Omega)$. Here $B_\varepsilon(s)=\int_0^s\beta_\varepsilon(\tau)\,d\tau$, $\varepsilon>0$, ${\beta}_{\varepsilon}(s)={1 \over \varepsilon} \beta({s \over \varepsilon})$, with $\beta$ a Lipschitz function satisfying $\beta>0$ in $(0,1)$, $\beta\equiv 0$ outside $(0,1)$. We prove that if ${u^\varepsilon}$ are nonnegative local minimizers and the functions ${u^\varepsilon}$, $f^{{\varepsilon}}$ and $p_\varepsilon$ are uniformly bounded then, $u=\lim{u^\varepsilon}$ ($\varepsilon\to 0$) is a solution to an inhomogeneous free boundary problem for the $p(x)$-Laplacian and the free boundary $\Omega\cap\partial\{u>0\}$ is a $C^{1,\alpha}$ surface with the exception of a subset of ${\mathcal H}^{N-1}$-measure zero. We also obtain further regularity results on the free boundary, under further regularity assumptions on the data.