{"title":"整个指数型函数的汉克尔变换的终结泊恩卡雷渐近展开","authors":"Nathalie Liezel R. Rojas, Eric A. Galapon","doi":"arxiv-2409.10948","DOIUrl":null,"url":null,"abstract":"We perform an asymptotic evaluation of the Hankel transform,\n$\\int_0^{\\infty}J_{\\nu}(\\lambda x) f(x)\\mathrm{d}x$, for arbitrarily large\n$\\lambda$ of an entire exponential type function, $f(x)$, of type $\\tau$ by\nshifting the contour of integration in the complex plane. Under the situation\nthat $J_{\\nu}(\\lambda x)f(x)$ has an odd parity with respect to $x$ and the\ncondition that the asymptotic parameter $\\lambda$ is greater than the type\n$\\tau$, we obtain an exactly terminating Poincar{\\'e} expansion without any\ntrailing subdominant exponential terms. That is the Hankel transform evaluates\nexactly into a polynomial in inverse $\\lambda$ as $\\lambda$ approaches\ninfinity.","PeriodicalId":501312,"journal":{"name":"arXiv - MATH - Mathematical Physics","volume":"29 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Terminating Poincare asymptotic expansion of the Hankel transform of entire exponential type functions\",\"authors\":\"Nathalie Liezel R. Rojas, Eric A. Galapon\",\"doi\":\"arxiv-2409.10948\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We perform an asymptotic evaluation of the Hankel transform,\\n$\\\\int_0^{\\\\infty}J_{\\\\nu}(\\\\lambda x) f(x)\\\\mathrm{d}x$, for arbitrarily large\\n$\\\\lambda$ of an entire exponential type function, $f(x)$, of type $\\\\tau$ by\\nshifting the contour of integration in the complex plane. Under the situation\\nthat $J_{\\\\nu}(\\\\lambda x)f(x)$ has an odd parity with respect to $x$ and the\\ncondition that the asymptotic parameter $\\\\lambda$ is greater than the type\\n$\\\\tau$, we obtain an exactly terminating Poincar{\\\\'e} expansion without any\\ntrailing subdominant exponential terms. That is the Hankel transform evaluates\\nexactly into a polynomial in inverse $\\\\lambda$ as $\\\\lambda$ approaches\\ninfinity.\",\"PeriodicalId\":501312,\"journal\":{\"name\":\"arXiv - MATH - Mathematical Physics\",\"volume\":\"29 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - MATH - Mathematical Physics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.10948\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - MATH - Mathematical Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.10948","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Terminating Poincare asymptotic expansion of the Hankel transform of entire exponential type functions
We perform an asymptotic evaluation of the Hankel transform,
$\int_0^{\infty}J_{\nu}(\lambda x) f(x)\mathrm{d}x$, for arbitrarily large
$\lambda$ of an entire exponential type function, $f(x)$, of type $\tau$ by
shifting the contour of integration in the complex plane. Under the situation
that $J_{\nu}(\lambda x)f(x)$ has an odd parity with respect to $x$ and the
condition that the asymptotic parameter $\lambda$ is greater than the type
$\tau$, we obtain an exactly terminating Poincar{\'e} expansion without any
trailing subdominant exponential terms. That is the Hankel transform evaluates
exactly into a polynomial in inverse $\lambda$ as $\lambda$ approaches
infinity.