{"title":"Approximation of the Hilbert Transform on the unit circle","authors":"Luisa Fermo, Valerio Loi","doi":"arxiv-2409.07810","DOIUrl":null,"url":null,"abstract":"The paper deals with the numerical approximation of the Hilbert transform on\nthe unit circle using Szeg\\\"o and anti-Szeg\\\"o quadrature formulas. These\nschemes exhibit maximum precision with oppositely signed errors and allow for\nimproved accuracy through their averaged results. Their computation involves a\nfree parameter associated with the corresponding para-orthogonal polynomials.\nHere, it is suitably chosen to construct a Szeg\\\"o and anti-Szeg\\\"o formula\nwhose nodes are strategically distanced from the singularity of the Hilbert\nkernel. Numerical experiments demonstrate the accuracy of the proposed method.","PeriodicalId":501162,"journal":{"name":"arXiv - MATH - Numerical Analysis","volume":"11 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - MATH - Numerical Analysis","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.07810","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
The paper deals with the numerical approximation of the Hilbert transform on
the unit circle using Szeg\"o and anti-Szeg\"o quadrature formulas. These
schemes exhibit maximum precision with oppositely signed errors and allow for
improved accuracy through their averaged results. Their computation involves a
free parameter associated with the corresponding para-orthogonal polynomials.
Here, it is suitably chosen to construct a Szeg\"o and anti-Szeg\"o formula
whose nodes are strategically distanced from the singularity of the Hilbert
kernel. Numerical experiments demonstrate the accuracy of the proposed method.