We consider quotients of the unit cube semigroup algebra by particular Zr≀Sn-invariant ideals. Using Gröbner basis methods, we show that the resulting graded quotient algebra has a basis where each element is indexed by colored permutations (π,ϵ)∈Zr≀Sn and each element encodes the negative descent and negative major index statistics on (π,ϵ). This gives an algebraic interpretation of these statistics that was previously unknown. This basis of the Zr≀Sn-quotients allows us to recover certain combinatorial identities involving Euler–Mahonian distributions of statistics.
|Number of pages||18|
|Journal||European Journal of Combinatorics|
|State||Published - Mar 2018|
Bibliographical noteFunding Information:
The authors would like to thank the anonymous referees for their helpful comments and suggestions. The first author was partially supported by grant H98230-16-1-0045 from the U.S. National Security Agency . The second author was partially supported by a 2016 National Science Foundation/Japanese Society for the Promotion of Science East Asia and Pacific Summer Institutes Fellowship award NSF OISE–1613525 .
© 2017 Elsevier Ltd
ASJC Scopus subject areas
- Discrete Mathematics and Combinatorics