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arXiv 1902.07020math.AP
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通过 Robin 边界条件耦合的体--表面 Allen--Cahn 系统的平衡态收敛性

Convergence to equilibrium for a bulk--surface Allen--Cahn system coupled through a Robin boundary condition

Kei Fong Lam, Hao Wu

AI总结:

研究附加 Robin 边界条件的体--表面 Allen--Cahn 耦合系统,利用扩展的 Lojasiewicz--Simon 型不等式,证明了全局强解在时间趋于无穷时收敛至单一平衡态并给出了收敛速率估计。

摘要:

我们考虑一个体--表面 Allen--Cahn 耦合系统,该系统在体变量与表面变量之间附加了 Robin 型边界条件。此系统也可视为具有非平凡传输条件的体--表面 Allen--Cahn 系统的一种松弛。假设非线性项为实解析的,我们证明了当时间趋于无穷大时,每个全局强解均收敛至单一平衡态。此外,我们得到了关于收敛速率的估计。该证明依赖于针对体--表面耦合系统的一个扩展的 Lojasiewicz--Simon 型不等式。与以往工作相比,出现了新的困难,因为在我们的系统中表面变量不再是体变量的迹,而是通过非线性 Robin 边界条件相互耦合。

英文摘要:

We consider a coupled bulk--surface Allen--Cahn system affixed with a Robin-type boundary condition between the bulk and surface variables. This system can also be viewed as a relaxation to a bulk--surface Allen--Cahn system with non-trivial transmission conditions. Assuming that the nonlinearities are real analytic, we prove the convergence of every global strong solution to a single equilibrium as time tends to infinity. Furthermore, we obtain an estimate on the rate of convergence. The proof relies on an extended Lojasiewicz--Simon type inequality for the bulk--surface coupled system. Compared with previous works, new difficulties arise as in our system the surface variable is no longer the trace of the bulk variable, but now they are coupled through a nonlinear Robin boundary condition.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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