arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.11403math.AP
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退化/奇异抛物型方程边界控制的存在性和代价

Existence and cost of boundary controls for a degenerate/singular parabolic equation

Umberto Biccari, Víctor Hernández-Santamaría, Judith Vancostenoble

摘要:

本文考虑退化/奇异抛物型方程$$ u_t -(x^αu_{x})_x - \fracμ{x^{2-α}} u =0, \qquad x\in (0,1), \ t \in (0,T), $$,其中$0\leq α<1$和$μ\leq (1-α)^2/4$是两个实参数.我们证明了通过$H^1(0,T)$控制作用在$x=1$或退化和奇异点$x=0$的边界零可控性。此外,我们给出了尖锐的估计成本的可控性在这两种情况下的参数$α$和$μ$。证明的基础上的经典矩法Fattorini和罗素和最近的结果双正交序列。

英文摘要:

In this paper, we consider the following degenerate/singular parabolic equation $$ u_t -(x^αu_{x})_x - \fracμ{x^{2-α}} u =0, \qquad x\in (0,1), \ t \in (0,T), $$ where $0\leq α<1$ and $μ\leq (1-α)^2/4$ are two real parameters. We prove the boundary null controllability by means of a $H^1(0,T)$ control acting either at $x=1$ or at the point of degeneracy and singularity $x=0$. Besides we give sharp estimates of the cost of controllability in both cases in terms of the parameters $α$ and $μ$. The proofs are based on the classical moment method by Fattorini and Russell and on recent results on biorthogonal sequences.

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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