
arXiv: math/0006164
We find an explicit expression for the generating function of the number of permutations in S_n avoiding a subgroup of S_k generated by all but one simple transpositions. The generating function turns out to be rational, and its denominator is a rook polynomial for a rectangular board.
permutations, Exact enumeration problems, generating functions, [info.info-dm] computer science [cs]/discrete mathematics [cs.dm], rook polynomial, parabolic subgroups, permutation, 05A05, QA1-939, FOS: Mathematics, Mathematics - Combinatorics, Laguerre polynomials, Symmetric groups, laguerre polynomials, 05A05; 05A15; 05E35; 33C45, rook polynomials, 33C45, forbidden patterns, [INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM], 05E35, generating function, Combinatorics (math.CO), 05A15, Mathematics
permutations, Exact enumeration problems, generating functions, [info.info-dm] computer science [cs]/discrete mathematics [cs.dm], rook polynomial, parabolic subgroups, permutation, 05A05, QA1-939, FOS: Mathematics, Mathematics - Combinatorics, Laguerre polynomials, Symmetric groups, laguerre polynomials, 05A05; 05A15; 05E35; 33C45, rook polynomials, 33C45, forbidden patterns, [INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM], 05E35, generating function, Combinatorics (math.CO), 05A15, Mathematics
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