Cluster compatibility conjecture for decorated reduced words

Let GG be the reductive group with Weyl group WW, let UU be its maximal unipotent subgroup, and let w0w_0 be the longest element of WW. For a decorated reduced word I\mathbb{I} of w0w_0, let XI{\bf X}_{\mathbb{I}} be the associated set of m=dim(U)m=\dim(U) irreducible polynomials on UU.

Cluster compatibility conjecture. For any decorated reduced word for w0w_0, the set XI{\bf X}_{\mathbb{I}} is a cluster for UU mutation-equivalent to an initial cluster attached to any reduced word i{\bf i} for w0w_0.

This conjecture proposes that the toric coordinates arising from decorated reduced words fit into the existing cluster structure on the maximal unipotent subgroup. Its resolution is not given in the source.

Sources & referencesView supporting material

Primary source

Arkady Berenstein and Yanpeng Li, “Geometric Multiplicities”, arXiv:1908.11581 (2019).

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