{"title":"Two q-Operational Equations and Hahn Polynomials","authors":"","doi":"10.1007/s11785-024-01496-3","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>Motivated by Liu’s (Sci China Math 66:1199–1216, 2023) recent work. This article reveals the essential features of Hahn polynomials by presenting a new <em>q</em>-exponential operator, that is <span> <span>$$\\begin{aligned} \\exp _q(t\\Delta _{x,a})f(x)=\\frac{(axt;q)_{\\infty }}{(xt;q)_{\\infty }} \\sum _{n=0}^{\\infty }\\frac{t^n}{(q;q)_n} f(q^n x) \\end{aligned}$$</span> </span>with <span> <span>\\(\\Delta _{x,a}=x (1-a)\\eta _a+\\eta _x\\)</span> </span> and <span> <span>\\(\\eta _x \\{f(x) \\}=f(qx)\\)</span> </span>. Letting <span> <span>\\(f(x) \\equiv 1\\)</span> </span> and the above operator equation immediately becomes the generating function of Hahn polynomials. These lead us to use a systematic method for studying identities involving Hahn polynomials. As applications, we use the method of the <em>q</em>-exponential operator to prove some new <em>q</em>-identities, including <em>q</em>-Nielsen’s formulas and Carlitz’s extension for the Hahn polynomials, etc. Moreover, a generalization of <em>q</em>-Gauss summation is given, too. </p>","PeriodicalId":50654,"journal":{"name":"Complex Analysis and Operator Theory","volume":"68 1","pages":""},"PeriodicalIF":0.7000,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Complex Analysis and Operator Theory","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1007/s11785-024-01496-3","RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
Abstract
Motivated by Liu’s (Sci China Math 66:1199–1216, 2023) recent work. This article reveals the essential features of Hahn polynomials by presenting a new q-exponential operator, that is $$\begin{aligned} \exp _q(t\Delta _{x,a})f(x)=\frac{(axt;q)_{\infty }}{(xt;q)_{\infty }} \sum _{n=0}^{\infty }\frac{t^n}{(q;q)_n} f(q^n x) \end{aligned}$$with \(\Delta _{x,a}=x (1-a)\eta _a+\eta _x\) and \(\eta _x \{f(x) \}=f(qx)\). Letting \(f(x) \equiv 1\) and the above operator equation immediately becomes the generating function of Hahn polynomials. These lead us to use a systematic method for studying identities involving Hahn polynomials. As applications, we use the method of the q-exponential operator to prove some new q-identities, including q-Nielsen’s formulas and Carlitz’s extension for the Hahn polynomials, etc. Moreover, a generalization of q-Gauss summation is given, too.
期刊介绍:
Complex Analysis and Operator Theory (CAOT) is devoted to the publication of current research developments in the closely related fields of complex analysis and operator theory as well as in applications to system theory, harmonic analysis, probability, statistics, learning theory, mathematical physics and other related fields. Articles using the theory of reproducing kernel spaces are in particular welcomed.