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The Permutations 123 p 4 … p m and 321 p 4 … p m are Wilf-Equivalent

Graphs and Combinatorics, 2000
Write p 1, p 2…p m for the permutation matrix δ pi, j . Let S n (M) be the set of n×n permutation matrices which do not contain the m×m permutation matrix M as a submatrix. In [7] Simion and Schmidt show bijectively that |S n
Eric Babson, Julian West
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Further refinements of Wilf-equivalence for patterns of length 4

Journal of Combinatorial Theory, Series A
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Zhou, Robin D. P., Zang, Yongchun, Yan, Sherry H. F.   +2 more
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