Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models
Let J: ℝ → ℝ be a nonnegative, smooth function with ∫ℝ J(r)dr = 1, supported in [-1, 1], symmetric, J(r) = J(-r), and strictly increasing in [-1,0]. We consider the Neumann boundary value problem for a nonlocal, nonlinear operator that is similar to the porous medium,...
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2007
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00029939_v135_n12_p3837_Bogoya http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00029939_v135_n12_p3837_Bogoya_oai |
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I28-R145-paper_00029939_v135_n12_p3837_Bogoya_oai2020-10-19 Bogoya, M. Ferreira, R. Rossi, J.D. 2007 Let J: ℝ → ℝ be a nonnegative, smooth function with ∫ℝ J(r)dr = 1, supported in [-1, 1], symmetric, J(r) = J(-r), and strictly increasing in [-1,0]. We consider the Neumann boundary value problem for a nonlocal, nonlinear operator that is similar to the porous medium, and we study the equation ut(x, t)=∫L-L(J(x-y/ u(y,t) - J(x-y/u(x, t))dy, x∈[-L, L].We prove existence and uniqueness of solutions and a comparison principle. We find the asymptotic behaviour of the solutions as t → ∞: they converge to the mean value of the initial data. Next, we consider a discrete version of the above problem. Under suitable hypotheses we prove that the discrete model has properties analogous to the continuous one. Moreover, solutions of the discrete problem converge to the continuous ones when the mesh parameter goes to zero. Finally, we perform some numerical experiments. © 2007 American Mathematical Society. Fil:Rossi, J.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00029939_v135_n12_p3837_Bogoya info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Proc. Am. Math. Soc. 2007;135(12):3837-3846 Neumann boundary conditions Nonlocal diffusion Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00029939_v135_n12_p3837_Bogoya_oai |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-145 |
| collection |
Repositorio Digital de la Universidad de Buenos Aires (UBA) |
| topic |
Neumann boundary conditions Nonlocal diffusion |
| spellingShingle |
Neumann boundary conditions Nonlocal diffusion Bogoya, M. Ferreira, R. Rossi, J.D. Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models |
| topic_facet |
Neumann boundary conditions Nonlocal diffusion |
| description |
Let J: ℝ → ℝ be a nonnegative, smooth function with ∫ℝ J(r)dr = 1, supported in [-1, 1], symmetric, J(r) = J(-r), and strictly increasing in [-1,0]. We consider the Neumann boundary value problem for a nonlocal, nonlinear operator that is similar to the porous medium, and we study the equation ut(x, t)=∫L-L(J(x-y/ u(y,t) - J(x-y/u(x, t))dy, x∈[-L, L].We prove existence and uniqueness of solutions and a comparison principle. We find the asymptotic behaviour of the solutions as t → ∞: they converge to the mean value of the initial data. Next, we consider a discrete version of the above problem. Under suitable hypotheses we prove that the discrete model has properties analogous to the continuous one. Moreover, solutions of the discrete problem converge to the continuous ones when the mesh parameter goes to zero. Finally, we perform some numerical experiments. © 2007 American Mathematical Society. |
| format |
Artículo Artículo publishedVersion |
| author |
Bogoya, M. Ferreira, R. Rossi, J.D. |
| author_facet |
Bogoya, M. Ferreira, R. Rossi, J.D. |
| author_sort |
Bogoya, M. |
| title |
Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models |
| title_short |
Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models |
| title_full |
Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models |
| title_fullStr |
Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models |
| title_full_unstemmed |
Neumann boundary conditions for a nonlocal nonlinear diffusion operator. Continuous and discrete models |
| title_sort |
neumann boundary conditions for a nonlocal nonlinear diffusion operator. continuous and discrete models |
| publishDate |
2007 |
| url |
http://hdl.handle.net/20.500.12110/paper_00029939_v135_n12_p3837_Bogoya http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00029939_v135_n12_p3837_Bogoya_oai |
| work_keys_str_mv |
AT bogoyam neumannboundaryconditionsforanonlocalnonlineardiffusionoperatorcontinuousanddiscretemodels AT ferreirar neumannboundaryconditionsforanonlocalnonlineardiffusionoperatorcontinuousanddiscretemodels AT rossijd neumannboundaryconditionsforanonlocalnonlineardiffusionoperatorcontinuousanddiscretemodels |
| _version_ |
1766026469663834112 |