Abstract
Adin and Roichman proved a set of refined sign-balance identities on 321-avoiding permutations respecting the last descent of the permutations, which we call the identities of Adin-Roichman type. In this work, we construct a new involution on plane trees that proves refined sign-balance properties on 321-avoiding alternating permutations respecting the first and last entries of the permutations respectively and obtain two sets of identities of Adin-Roichman type.
Original language | English |
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Pages (from-to) | 2228-2237 |
Number of pages | 10 |
Journal | Discrete Mathematics |
Volume | 312 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2012 Aug 6 |
Externally published | Yes |
Keywords
- 321-avoiding permutation
- Alternating permutation
- Dyck path
- Plane tree
- Sign-balance
- Sign-reversing involution
ASJC Scopus subject areas
- Theoretical Computer Science
- Discrete Mathematics and Combinatorics