Symmetry Groups of Hypergeometric Series
arXiv:1310.7273 · doi:10.3842/SIGMA.2014.026
Abstract
Structures of symmetries of transformations for Holman-Biedenharn-Louck hypergeometric series: terminating balanced series and elliptic series are discussed. Namely the description of the invariance groups and the classification all of possible transformations for each types of hypergeometric series are given. Among them, a "periodic" affine Coxeter group which seems to be new in the literature arises as an invariance group for a class of series.