Rubey's lattice conjecture for generalized chute moves

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For a permutation ww, let \rp(w)\rp(w) 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 14321432-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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