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Abstract:

We study the behaviour of solutions of the nonlinear diffusion equation in the half-line, ℝ+ = (0, ∞), with a nonlinear boundary condition, {ut = uuxx, (x, t) ∈ ℝ+ (0, T), -ux(0,t) = up(0,t), t ∈ (0,T), u(x,0) = u0(x), x ∈ ℝ+ with p > 0. We describe, in terms of p and the initial datum, when the solution is global in time and when it blows up in finite time. For blowing up solutions we find the blow-up rate and the blow-up set and we describe the asymptotic behaviour close to the blow-up time in terms of a self-similar profile. The stationary character of the support is proved both for global solutions and blowing-up solutions. Also we obtain results for the problem in a bounded interval. Indiana University Mathematics Journal ©.

Registro:

Documento: Artículo
Título:Blow-up for a degenerate diffusion problem not in divergence form
Autor:Ferreira, R.; De Pablo, A.; Rossi, J.D.
Filiación:Departamento de Matemáticas, U. Carlos III de Madrid, 28911 Leganés, Spain
Departamento de Matemática, F.C.E y N., Universidad Nacional de Buenos Aires, (1428) Buenos Aires, Argentina
Palabras clave:Asymptotic behaviour; Blow-up; Nonlinear boundary conditions
Año:2006
Volumen:55
Número:3
Página de inicio:955
Página de fin:974
DOI: http://dx.doi.org/10.1512/iumj.2006.55.2725
Título revista:Indiana University Mathematics Journal
Título revista abreviado:Indiana Univ. Math. J.
ISSN:00222518
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222518_v55_n3_p955_Ferreira

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Citas:

---------- APA ----------
Ferreira, R., De Pablo, A. & Rossi, J.D. (2006) . Blow-up for a degenerate diffusion problem not in divergence form. Indiana University Mathematics Journal, 55(3), 955-974.
http://dx.doi.org/10.1512/iumj.2006.55.2725
---------- CHICAGO ----------
Ferreira, R., De Pablo, A., Rossi, J.D. "Blow-up for a degenerate diffusion problem not in divergence form" . Indiana University Mathematics Journal 55, no. 3 (2006) : 955-974.
http://dx.doi.org/10.1512/iumj.2006.55.2725
---------- MLA ----------
Ferreira, R., De Pablo, A., Rossi, J.D. "Blow-up for a degenerate diffusion problem not in divergence form" . Indiana University Mathematics Journal, vol. 55, no. 3, 2006, pp. 955-974.
http://dx.doi.org/10.1512/iumj.2006.55.2725
---------- VANCOUVER ----------
Ferreira, R., De Pablo, A., Rossi, J.D. Blow-up for a degenerate diffusion problem not in divergence form. Indiana Univ. Math. J. 2006;55(3):955-974.
http://dx.doi.org/10.1512/iumj.2006.55.2725