English

Heine's method and $A_n$ to $A_m$ transformation formulas

Classical Analysis and ODEs 2019-05-01 v2

Abstract

We apply Heine's method---the key idea Heine used in 1846 to derive his famous transformation formula for 2ϕ1_2\phi_1 series---to multiple basic series over the root system of type AA. In the classical case, this leads to a bibasic extension of Heine's formula, which was implicit in a paper of Andrews which he wrote in 1966. As special cases, we recover extensions of many of Ramanujan's 2ϕ1_2\phi_1 transformations. In addition, we extend previous work of the author regarding a bibasic extension of Andrews' qq-Lauricella function, and show how to obtain very general transformation formulas of this type. The results obtained include transformations of an nn-fold sum into an mm-fold sum.

Cite

@article{arxiv.1705.10095,
  title  = {Heine's method and $A_n$ to $A_m$ transformation formulas},
  author = {Gaurav Bhatnagar},
  journal= {arXiv preprint arXiv:1705.10095},
  year   = {2019}
}

Comments

23 pages (Accepted in Ramanujan J.)

R2 v1 2026-06-22T20:01:58.588Z