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arXiv 2002.04249math.AP
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阻尼Wave Equation的分布解

Distributional Solutions of the Damped Wave Equation

Marc Nualart

摘要:

本文给出了一维阻尼波方程(也称为电报员方程)解的结果,初始条件是一般分布,而不仅仅是函数。我们完整地推导出了它的基本解,包括正的和负的时间。为了得到它们,我们只使用自相似参数和分布演算,不使用傅立叶或拉普拉斯变换。接下来,我们使用这些基本解来证明分布初值问题解的存在性和唯一性。作为应用,我们恢复了经典函数空间中初始数据的半群性质,也恢复了某个金融价格演化模型的概率分布函数。

英文摘要:

This work presents results on solutions of the one-dimensional damped wave equation, also called telegrapher's equation, when the initial conditions are general distributions, not only functions. We make a complete deduction of its fundamental solutions, both for positive and negative times. To obtain them we use only self-similarity arguments and distributional calculus, making no use of Fourier or Laplace transforms. We next use these fundamental solutions to prove both the existence and the uniqueness of solutions to the distributional initial value problem. As applications we recover the semigroup property for initial data in classical function spaces and also the probability distribution function for a certain financial model of evolution of prices.

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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