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arXiv 1905.09583math.AP
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反应扩散方程的奇性极限和速度不连续的几何流

Singular limits of reaction diffusion equations and geometric flows with discontinuous velocity

Cecilia De Zan, Pierpaolo Soravia

摘要:

考虑一类非线性反应扩散方程的行波解的速度依赖于空间变量且收敛于间断函数的奇异极限.我们表明,该家庭的解决方案收敛到稳定的平衡点的前传播的不连续的速度。通过应用黏性解理论和水平集方程唯一定义的弱几何流,证明了算法的全局收敛性。

英文摘要:

We consider the singular limit of a bistable reaction diffusion equation in the case when the velocity of the traveling wave solution depends on the space variable and converges to a discontinuous function. We show that the family of solutions converges to the stable equilibria off a front propagating with a discontinuous velocity. The convergence is global in time by applying the weak geometric flow uniquely defined through the theory of viscosity solutions and the level-set equation.

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