Pattern Avoidance by Even Permutations
Electr. J. Comb., pp. 282011.
We study questions of even-Wilf-equivalence, the analogue of Wilf-equivalence when attention is restricted to pattern avoidance by permutations in the alternating group. Although some Wilf-equivalence results break when considering even-Wilf-equivalence analogues, we prove that other Wilf-equivalence results continue to hold in the even-...More
PPT (Upload PPT)