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arXiv 1005.3606math.AP
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具有梯度源的degenerate parabolic equation方程分离变量解的收敛性

Convergence to separate variables solutions for a degenerate parabolic equation with gradient source

Philippe Laurencot, Christian Stinner

摘要:

研究了一类具有仅依赖于梯度的源项的拟线性退化扩散方程非负解的大时间行为。经过适当的重新调整的时间,收敛到一个独特的配置文件显示的全球解决方案。证明依赖于半松弛极限技术的理论内的黏性解和建设合适的超解和障碍函数,以获得最佳的时间衰减率和边界估计。研究了弱解的爆破问题。

英文摘要:

The large time behaviour of nonnegative solutions to a quasilinear degenerate diffusion equation with a source term depending solely on the gradient is investigated. After a suitable rescaling of time, convergence to a unique profile is shown for global solutions. The proof relies on the half-relaxed limits technique within the theory of viscosity solutions and on the construction of suitable supersolutions and barrier functions to obtain optimal temporal decay rates and boundary estimates. Blowup of weak solutions is also studied.

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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