Sur le nombre d'intervalles dans les treillis de Tamari
英文摘要：
We enumerate the intervals in the Tamari lattices. For this, we introduce an inductive description of the intervals. Then a notion of "new interval" is defined and these are also enumerated. A a side result, the inverse of two special series is computed in a group of tree-indexed series.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
