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arXiv 2408.14741math.AP
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正则性的传播与色散爆破现象向高阶广义 KdV 方程的推广

The propagation of regularity and dispersive blow-up phenomenon to higher-order generalized KdV equations

Minjie Shan

AI总结:

本文研究了高阶广义 KdV 方程初值问题的光滑性与奇异性,证明了正则性以无穷大速度传播,并通过构造光滑初始数据揭示了由短波或长波聚焦引起的色散爆破现象。

摘要:

本文研究了与高阶广义 KdV 方程相关的初值问题的光滑性与奇异性特殊性质。一方面,我们证明了正则性传播现象。更确切地说,在 KdV 流的作用下,实直线右端的初始数据正则性以无穷大速度传播至左端。另一方面,我们通过构造一类光滑初始数据证明了色散爆破现象将会发生,使得具有给定初始数据的整体解在正的无理数时刻保持光滑,而整体解在每个时空正有理点处呈现奇异性。该爆破现象完全由解的线性部分引起,其原因是短波或长波的聚焦。

英文摘要:

Some special properties of smoothness and singularity concerning to the initial value problem associated with higher-order generalized KdV equations are investigated. On one hand, we show the propagation of regularity phenomena. More precisely, the regularity of initial data on the right-hand side of the real line is propagated to the left-hand side with infinite speed under the higher-order KdV flow. On the other hand, we show that the dispersive blow-up phenomenon will occur by constructing a class of smoothing initial data such that global solutions with the given initial data keep smooth at positive generic irrational times, while global solutions display singularity at each time-space positive rational point. The blow-up phenomenon is exclusively caused by the linear part of solutions due to the focusing of short or long waves.

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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