{"title":"On one equality of integrals","authors":"A. A. Dmitriev","doi":"10.47910/femj202204","DOIUrl":null,"url":null,"abstract":"The note proves the equality $\\frac1{2\\pi i}\\mskip-8mu\\oint_{|z|=r}\\mskip-8mu\\ln\\mskip-4mu\\left[1{-}f(z)\\left(z{+}\\frac1z\\right)\\right]dz=-\\frac1{2\\pi i}\\mskip-8mu\\oint_{|z|=r}\\mskip-4mu\\exp\\left(\\frac{1{-}\\sqrt{1-4f^2(z)}}{2zf(z)}\\right)dz.$","PeriodicalId":388451,"journal":{"name":"Dal'nevostochnyi Matematicheskii Zhurnal","volume":"1997 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dal'nevostochnyi Matematicheskii Zhurnal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.47910/femj202204","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 note proves the equality $\frac1{2\pi i}\mskip-8mu\oint_{|z|=r}\mskip-8mu\ln\mskip-4mu\left[1{-}f(z)\left(z{+}\frac1z\right)\right]dz=-\frac1{2\pi i}\mskip-8mu\oint_{|z|=r}\mskip-4mu\exp\left(\frac{1{-}\sqrt{1-4f^2(z)}}{2zf(z)}\right)dz.$