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Definition of Tamari lattice
1. Noun. (mathematics) A partially ordered set in which the elements consist of different ways of grouping a sequence of objects into pairs using parentheses (e.g. for a sequence of four objects ''abcd'', the five possible groupings are ''((ab)c)d'', ''(ab)(cd)'', ''(a(bc))d'', ''a((bc)d)'', and ''a(b(cd))''). ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Tamari Lattice
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