Abstract
Björner and Wachs provided two q-generalizations of Knuth's hook formula counting linear extensions of forests: one involving the major index statistic, and one involving the inversion number statistic. We prove a multivariate generalization of their inversion number result, motivated by specializations related to the modular invariant theory of finite general linear groups.
Original language | English (US) |
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Pages (from-to) | 33-51 |
Number of pages | 19 |
Journal | Ramanujan Journal |
Volume | 31 |
Issue number | 1-2 |
DOIs | |
State | Published - Jun 2013 |
Bibliographical note
Funding Information:First author partially supported by grant ANR-06-BLAN-0380. Second author partially supported by NSF grant DMS-0601010.
Keywords
- Binary search
- Forests
- Free quasisymmetric functions
- Hook formula
- Loday-Ronco algebra
- Moulds