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arXiv 2501.13640math.APmath.OC
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KdV系统在所有临界长度上的小时间局部可控性

Small-time local controllability of a KdV system for all critical lengths

Jingrui Niu, Shengquan Xiang

AI总结:

本文研究了KdV系统在所有临界长度上的小时间局部可控性问题,证明在特定条件下系统不可控,填补了该领域长期存在的空白。

摘要:

本文考虑了在区间上带有Neumann边界控制的KdV系统的小时间局部可控性问题。1997年,Rosier发现线性化系统在临界长度时不可控,即当长度L=2π√[(k²+kl+l²)/3],其中k和l为整数时。Coron和Crépeau(2003)证明,即使线性化系统不可控,若k=l是唯一的解对,则非线性系统在小时间上局部可控。后来,Cerpa和Crépeau证明该系统在所有临界长度上大时间局部可控。2020年,Coron、Koenig和Nguyen发现若2k+l不属于3N*,则系统在小时间上不可控。本文证明,若临界长度满足2k+l∈3N*且k≠l,则系统在小时间上不可控。本文结果与上述结果共同回答了KdV系统在所有临界长度上的小时间局部可控性问题,自Rosier的开创性工作以来,这一长期未解问题得以圆满解决。

英文摘要:

In this paper, we consider the small-time local controllability problem for the KdV system on an interval with a Neumann boundary control. In 1997, Rosier discovered that the linearized system is uncontrollable if and only if the length is critical, namely $L=2π\sqrt{(k^2+ kl+ l^2)/3}$ for some integers $k$ and $l$. Coron and Crépeau (2003) proved that the nonlinear system is small-time locally controllable even if the linearized system is not, provided that $k= l$ is the only solution pair. Later, Cerpa and Crepeau showed that the system is large-time locally controllable for all critical lengths. In 2020, Coron, Koenig, and Nguyen found that the system is not small-time locally controllable if $2k+l\not \in 3\mathbb{N}^*$. We demonstrate that if the critical length satisfies $2k+l \in 3\mathbb{N}^*$ with $k\neq l$, then the system is not small-time locally controllable. This paper, together with the above results, gives a complete answer to the longstanding open problem on the small-time local controllability of KdV on all critical lengths since the pioneer work by Rosier

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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