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arXiv 1303.3553math.AP
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具有非局部和局部Lagrange multiplier的质量守恒Allen-Cahn方程的收敛性

Convergence of a mass conserving Allen-Cahn equation whose Lagrange multiplier is nonlocal and local

Matthieu Alfaro, Pierre Alifrangis

摘要:

我们考虑\cite{Bra-Bre}中提出的质量守恒的Allen-Cahn方程:保证质量守恒的Lagrange乘子不仅包含非局域效应,而且包含局域效应(与\cite{Che-Hil-Log}相反)。由于扩散内层的厚度相关的参数趋于零,我们执行正式的渐近展开的解决方案。然后,利用这些近似解,在保体积平均曲率流存在经典解的假设下,严格地证明了其收敛于保体积平均曲率流.这需要精确分析实际和近似拉格朗日乘子之间的误差。

英文摘要:

We consider the mass conserving Allen-Cahn equation proposed in \cite{Bra-Bre}: the Lagrange multiplier which ensures the conservation of the mass contains not only nonlocal but also local effects (in contrast with \cite{Che-Hil-Log}). As a parameter related to the thickness of a diffuse internal layer tends to zero, we perform formal asymptotic expansions of the solutions. Then, equipped with these approximate solutions, we rigorously prove the convergence to the volume preserving mean curvature flow, under the assumption that classical solutions of the latter exist. This requires a precise analysis of the error between the actual and the approximate Lagrange multipliers.

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