Rubey's lattice conjecture for generalized chute moves
For a permutation , let denote its set of reduced pipe dreams, and order it by generalized chute moves. Rubey's lattice conjecture. This poset is a lattice. Certain special cases are known, including dominant, vexillary, and -avoiding permutations, but the conjecture remains open in general.
References
Primary source
Sara C. Billey, Yibo Gao and Brendan Pawlowski, “Introduction to the Cohomology of the Flag Variety”, arXiv:2506.21064 (2025).
Additional references
2 papers in this index state this conjecture (2018–2025). The statement above is taken from the most recent of them; the others are arXiv:1805.03566.
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