Quasi-shuffle products revisited
Abstract
Quasi-shuffle products, introduced by the first author, have been useful in studying multiple zeta values and some of their analogues and generalizations. The second author, together with Kajikawa, Ohno, and Okuda, significantly extended the definition of quasi-shuffle algebras so it could be applied to multiple zeta q-values. This article extends some of the algebraic machinery of the first author's original paper to the more general definition, and uses this extension to obtain various algebraic formulas in the quasi-shuffle algebra in a transparent way. Some applications to multiple zeta values, interpolated multiple zeta values, multiple q-zeta values, and multiple polylogarithms are given.
Keywords
Cite
@article{arxiv.1610.05180,
title = {Quasi-shuffle products revisited},
author = {Michael E. Hoffman and Kentaro Ihara},
journal= {arXiv preprint arXiv:1610.05180},
year = {2017}
}
Comments
This is an extensively revised and expanded version of the Max Planck Institute preprint (MPIM 2012-16) with the same title. 27 Oct 16: minor revision and corrections 3 Apr 17: additional revision and corrections