In this paper, we present a number of results surrounding Caselli's conjecture on the equidistribution of the major index with sign over the two subsets of permutations of f1, 2, . . . , ng containing respectively the word 1 2 k and the word (n k + 1) n as a subsequence, under a parity condition of n and k. We derive broader bijective results on permutations containing varied subsequences. As a consequence, we obtain the signed mahonian identities on families of restricted permutations, in the spirit of a well-known formula of Gessel and Simion, covering a combinatorial proof of Caselli's conjecture. We also derive an extension of the insertion lemma of Haglund, Loehr, and Remmel which allows us to obtain a signed enumerator of the major-index increments resulting from the insertion of a pair of consecutive numbers in any place of a given permutation.
|出版狀態||已發佈 - 2019|
|事件||31st International Conference on Formal Power Series and Algebraic Combinatorics, FPSAC 2019 - Ljubljana, 斯洛文尼亚|
持續時間: 2019 七月 1 → 2019 七月 5
|會議||31st International Conference on Formal Power Series and Algebraic Combinatorics, FPSAC 2019|
|期間||2019/07/01 → 2019/07/05|
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