In mathematics, a lattice word (or lattice permutation) is a string composed of positive integers, in which every prefix contains at least as many positive integers i as integers i + 1. A reverse lattice word, or Yamanouchi word (named after Takahiko Yamanouchi), is a string whose reversal is a lattice word.
In mathematics, a lattice word (or lattice permutation) is a string composed of positive integers, in which every prefix contains at least as many positive integers i as integers i + 1. A reverse lattice word, or Yamanouchi word (named after Takahiko Yamanouchi), is a string whose reversal is a lattice word.
Source: Wikipedia "Lattice word" · CC BY-SA 4.0
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