A structure theorem for fundamental solutions of analytic multipliers in $${\mathbb {R}}^n$$

Pub Date : 2024-02-26 DOI:10.1007/s11868-024-00586-2
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Abstract

Using a version of Hironaka’s resolution of singularities for real-analytic functions, any elliptic multiplier \(\text {Op}(p)\) of order \(d>0\) , real-analytic near \(p^{-1}(0)\) , has a fundamental solution \(\mu _0\) . We give an integral representation of \(\mu _0\) in terms of the resolutions supplied by Hironaka’s theorem. This \(\mu _0\) is weakly approximated in \(H^t_{\text {loc}}({\mathbb {R}}^n)\) for \(t<d-\frac{n}{2}\) by a sequence from a Paley-Wiener space. In special cases of global symmetry, the obtained integral representation can be made fully explicit, and we use this to compute fundamental solutions for two non-polynomial symbols.

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$${mathbb {R}}^n$ 中解析乘数基本解的结构定理
摘要 使用 Hironaka 的实解析函数奇点解析的一个版本,任何阶 \(d>0\) 的椭圆乘法器 \(text {Op}(p)\) ,在 \(p^{-1}(0)\) 附近的实解析,有基本解 \(\mu _0\) 。有一个基本解。我们根据 Hironaka 定理提供的决议给出了 \(\mu _0\) 的积分表示。对于 \(t<d-\frac{n}{2}\) 来说,这个 \(\mu _0\) 在 \(H^t_{\text {loc}}({\mathbb {R}}^n)\) 中被帕利-维纳空间的序列弱逼近。在全局对称的特殊情况下,所得到的积分表示可以是完全显式的,我们用它来计算两个非多项式符号的基本解。
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