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arxiv: 1707.08415 · v1 · pith:CDBBOGBMnew · submitted 2017-07-26 · 🧮 math.PR

Wave equation with a coloured stable noise

classification 🧮 math.PR
keywords equationmeasurecontinuousgeneratedmodificationrandomstablewave
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We define a random measure generated by a real anisotropic harmonizable fractional stable field $Z^H$ with stability parameter $\alpha\in(1,2)$ and Hurst index $H\in(1/2,1)$ and prove that the measure is $\sigma$-additive in probability. An integral with respect to this measure is constructed, which enables us to consider a wave equation in $\mathbb R^3$ with a random source generated by $Z^H$. We show that the solution to this equation, given by Kirchhoff's formula, has a modification, which is H\"older continuous of any order up to $(3H-1)\wedge 1$. In the case where $H\in(2/3,1)$, we show further that the modification is absolutely continuous.

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