134 search results - page 9 / 27 » Combinatorics of diagrams of permutations |
171
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COMBINATORICS
2002
15 years 6 months ago
2002
We prove that the space of possible final configurations for a parking problem is parameterized by the vertices of a regular Bruhat graph associated to a 231-avoiding permutation,...
167
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COMBINATORICS
1998
15 years 6 months ago
1998
It is shown that there are 2n n − n−1 m=0 2n−m−1 2m m permutations which are the union of an increasing sequence and a decreasing sequence. 1991 Mathematics Subject Classi...
142
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COMBINATORICS
2007
15 years 6 months ago
2007
For a permutation π = π1π2 · · · πn ∈ Sn and a positive integer i ≤ n, we can view π1π2 · · · πi as an element of Si by order-preserving relabeling. The j-set of ...