Amazing R-element conjecture for double-shortcut equivalence classes

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Let WW be a Coxeter group of type AA, and fix a Bruhat interval [u,v][u,v]. Consider the equivalence relation on the amazing hypercube decompositions of [u,v][u,v] generated by

z∼z′if DS(z,z′)=DS(z′,z),z\sim z'\quad\text{if }DS(z,z')=DS(z',z),

where DS(z,z′)DS(z,z') is the multiset of (z,z′)(z,z')-double shortcuts. Amazing RR-element conjecture. Every equivalence class of this relation contains an amazing RR-element. This is a weakening of the conjecture that the relation is trivial; together, these double-shortcut conjectures are intended to imply the Combinatorial Invariance Conjecture for type AA.

References

Primary source

Margherita Zannoni, “Double shortcuts of standard hypercube decompositions”, arXiv:2605.13304 (2026).

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