Mathematics – Combinatorics
Scientific paper
2001-10-04
Mathematics
Combinatorics
15 pages, LaTeX2e
Scientific paper
We find generating functions for the number of words avoiding certain
patterns or sets of patterns on at most 2 distinct letters and determine which
of them are equally avoided. We also find the exact number of words avoiding
certain patterns and provide bijective proofs for the resulting formulas.
Burstein Alexander
Mansour Toufik
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