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arXiv 2202.12461math.APmath-phmath.MPmath.PR
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具有一般非局部时空导数的扩散方程

Diffusion equations with general nonlocal time and space derivatives

Chung-Sik Sin, Hyong-Chol O, Sang-Mun Kim

摘要:

本文首先基于连续时间随机游动理论,推导了一般的扩散方程。时间导数被认为是Kochubei引入的一般Caputo型导数,空间导数是通过从论文中提出的一般分数拉普拉斯算子的定义中去除条件(1.5)和(1.6)而定义的一般拉普拉斯算子(Servadei和Valdinoci,2012)。其次,通过将一般Laplacian算子的区域推广到一般索伯列夫空间,证明了一般扩散方程Cauchy问题解的存在性.同时也得到了解的正性和有界性的结果。最后,利用书中介绍的一般分式Laplacian的Friedrichs延拓,建立了有界区域上一般扩散方程的初边值问题(IBVP)解的存在性结果(Bisci,Radulescu and Servadei,2016)。

英文摘要:

In the present study, firstly, based on the continuous time random walk (CTRW) theory, general diffusion equations are derived. The time derivative is taken as the general Caputo-type derivative introduced by Kochubei and the spatial derivative is the general Laplacian defined by removing the conditions (1.5) and (1.6) from the definition of the general fractional Laplacian proposed in the paper (Servadei and Valdinoci, 2012). Secondly, the existence of solutions of the Cauchy problem for the general diffusion equation is proved by extending the domain of the general Laplacian to a general Sobolev space. The results for positivity and boundedness of the solutions are also obtained. In the last, the existence result for solutions of the initial boundary value problem (IBVP) for the general diffusion equation on a bounded domain is established by using the Friedrichs extension of the general fractional Laplacian introduced in the book (Bisci, Radulescu and Servadei, 2016).

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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