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arXiv 2401.13620math.PRmath.AP
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准广义KPZ方程

Quasi-generalised KPZ equation

Yvain Bruned, Máté Gerencsér, Usama Nadeem

AI总结:

本文针对带时空白噪声的准广义KPZ方程,提出代数机制系统化移除非局部反项,推导出与半线性情形一致的重整化方程,并借助链式法则与Itô等距获得时间全局解。

摘要:

我们推导了带时空白噪声的准广义KPZ方程的重整化方程。我们通过一种代数机制补充了Gerencsér和Hairer发起的、利用正则性结构求解拟线性方程的计划,该机制提供了一个系统化工具来移除非局部反项,并给出与半线性情形一致的重整化方程的精确表达式。该解理论满足链式法则和自然的Itô等距概念,二者结合可获得时间全局解。

英文摘要:

We derive the renormalised equation for the quasi-generalised KPZ equation with space-time white noise. We complement the program initiated by Gerencsér and Hairer for solving quasi-linear equations using regularity structures by an algebraic machinery that gives a systematic tool to remove non-local counterterms and provide a precise expression of the renormalised equation that is consistent with the semilinear case. The solution theory satisfies the chain rule and a natural notion of Itô isometry, which can be combined to obtain global in time solution.

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