Osaka Journal of Mathematics

Longtime convergence for epitaxial growth model under Dirichlet conditions

Somayyeh Azizi, Gianluca Mola, and Atsushi Yagi

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This paper continues our study on the initial-boundary value problem for a semilinear parabolic equation of fourth order which has been presented by Johnson-Orme-Hunt-Graff-Sudijono-Sauder-Orr [12] to describe the large-scale features of a growing crystal surface under molecular beam epitaxy. In the preceding paper [1], we already constructed a dynamical system generated by the problem and verified that the dynamical system has a finite-dimensional attractor (especially, every trajectory has nonempty $\omega$-limit set) and admits a Lyapunov function (of the form (3.1)). This paper is then devoted to showing longtime convergence of trajectory. We shall prove that every trajectory converges to some stationary solution as $t \to \infty$. As a matter of fact, we have obtained in [10] the similar result for the equation but under the Neumann like boundary conditions $\frac{\partial u}{\partial n}=\frac\partial{\partial n}\varDelta u=0$ on the unknown function $u$. In this paper, we want as in [1] to handle the Dirichlet boundary conditions $u=\frac{\partial u}{\partial n}=0$, maybe physically more natural conditions than before.

Article information

Osaka J. Math. Volume 54, Number 4 (2017), 689-706.

First available in Project Euclid: 20 October 2017

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Primary: 35B40: Asymptotic behavior of solutions 35K55: Nonlinear parabolic equations 74E15: Crystalline structure


Azizi, Somayyeh; Mola, Gianluca; Yagi, Atsushi. Longtime convergence for epitaxial growth model under Dirichlet conditions. Osaka J. Math. 54 (2017), no. 4, 689--706.

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