{"title":"A structure theorem for fundamental solutions of analytic multipliers in $${\\mathbb {R}}^n$$","authors":"","doi":"10.1007/s11868-024-00586-2","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>Using a version of Hironaka’s resolution of singularities for real-analytic functions, any elliptic multiplier <span> <span>\\(\\text {Op}(p)\\)</span> </span> of order <span> <span>\\(d>0\\)</span> </span>, real-analytic near <span> <span>\\(p^{-1}(0)\\)</span> </span>, has a fundamental solution <span> <span>\\(\\mu _0\\)</span> </span>. We give an integral representation of <span> <span>\\(\\mu _0\\)</span> </span> in terms of the resolutions supplied by Hironaka’s theorem. This <span> <span>\\(\\mu _0\\)</span> </span> is weakly approximated in <span> <span>\\(H^t_{\\text {loc}}({\\mathbb {R}}^n)\\)</span> </span> for <span> <span>\\(t<d-\\frac{n}{2}\\)</span> </span> 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.</p>","PeriodicalId":0,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1007/s11868-024-00586-2","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
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.