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Results tagged with bruhat-order
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user 25028
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Formula for number of permutations less than a given permutation in weak order
Let $w\in S_n$ be a permutation. Is there a reasonable "formula" for the number of elements of the initial interval $[e,w]$ of weak (Bruhat) order from the identity to $w$?
In terms of what such a "f …
- 24.2k
8
votes
0
answers
191
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Two algebraic guises of Alternating Sign Matrices: any connection?
Alternating Sign Matrices (ASMs) have a famous history: they were discovered by Mills, Robbins, and Rumsey, who conjectured a product formula for their enumeration; this product formula was first prov …
- 24.2k