The strengthened orbit-interval conjecture for Bruhat-irreducible permutations

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Let w∈Snw \in \mathfrak{S}_n be Bruhat irreducible, and let O\mathcal{O} denote the orbit of ee under graph automorphisms of Γ(w)\Gamma(w). Define

v(w)≔w0(DL(w))⋅AR(w)⋅w0(DL(w)∩DR(w))⋅AL(w)⋅w0(DR(w)).v(w) \coloneqq w_0(D_L(w))\cdot A_R(w) \cdot w_0(D_L(w)\cap D_R(w)) \cdot A_L(w)\cdot w_0(D_R(w)).

Strengthened orbit-interval conjecture. Then O=[e,v(w)]\mathcal{O}=[e,v(w)]. This is presented as a strengthening of the orbit-interval conjecture; its status is not resolved in the supplied text.

References

Primary source

Christian Gaetz and Yibo Gao, “On automorphisms of undirected Bruhat graphs”, arXiv:2204.09174 (2022).

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