Abstract
We introduce a monoid structure on a certain set of labelled binary trees, by a process similar to the construction of the plactic monoid. This leads to a new interpretation of the algebra of planar binary trees of Loday–Ronco. To cite this article: F. Hivert et al., C. R. Acad. Sci. Paris, Ser. I 335 (2002) 577–580.
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