Tamari lattice (suomeksi)

Määritelmät:

(lb, en, 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))'').