The aforementioned convergent series in Ramanujan's “identity” is also similar to one that appears in a curious identity found in Chapter 15 in Ramanujan's second notebook, written in a more elegant, equivalent formulation on page 332 in the lost notebook. This formula may be regarded as a formula for 870815304059&_mathId=si1.gif&_user=111111111&_pii=S0001870815304059&_rdoc=1&_issn=00018708&md5=441bdc355ac020f293891bdf2862f795">870815304059-si1.gif">, and in 1925, S. Wigert obtained a generalization giving a formula for 870815304059&_mathId=si2.gif&_user=111111111&_pii=S0001870815304059&_rdoc=1&_issn=00018708&md5=749ae913628c085295623434a63d02d7">870815304059-si2.gif"> for any even integer 870815304059&_mathId=si3.gif&_user=111111111&_pii=S0001870815304059&_rdoc=1&_issn=00018708&md5=9038ee52a3dc255716c560621c9788a9" title="Click to view the MathML source">k≥2. We extend the work of Ramanujan and Wigert in this paper.
The Voronoï summation formula appears prominently in our study. In particular, we generalize work of J.R. Wilton and derive an analogue involving the sum of divisors function 870815304059&_mathId=si1169.gif&_user=111111111&_pii=S0001870815304059&_rdoc=1&_issn=00018708&md5=9e188a7fcffda0d780d8d4f132cfc5c8" title="Click to view the MathML source">σs(n).
The modified Bessel functions 870815304059&_mathId=si5.gif&_user=111111111&_pii=S0001870815304059&_rdoc=1&_issn=00018708&md5=1192aa7ef16fd9b178afeb7775e065fd" title="Click to view the MathML source">Ks(x) arise in several contexts, as do Lommel functions. We establish here new series and integral identities involving modified Bessel functions and modified Lommel functions. Among other results, we establish a modular transformation for an infinite series involving 870815304059&_mathId=si1169.gif&_user=111111111&_pii=S0001870815304059&_rdoc=1&_issn=00018708&md5=9e188a7fcffda0d780d8d4f132cfc5c8" title="Click to view the MathML source">σs(n) and modified Lommel functions. We also discuss certain obscure related work of N.S. Koshliakov. We define and discuss two new related classes of integral transforms, which we call Koshliakov transforms, because he first found elegant special cases of each.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址:北京市海淀区学院路29号 邮编:100083 电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700 |