Linear-ordering conjecture for reflection representations of skew-symmetrizable matrices

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Let BB be a skew-symmetrizable matrix indexed by I=1,…,n\mathcal I={1,\ldots,n}. For a mutation sequence w\boldsymbol{w}, let riwr_i^{\boldsymbol{w}} be the associated reflections, let CwC^{\boldsymbol{w}} be its CC-matrix, and let pipi be the representation determined by a linear ordering precprec and its associated generalized intersection matrix. Linear-ordering conjecture. For any skew-symmetrizable matrix BB, there exists a linear ordering precprec on I\mathcal I such that, if boldsymbolwboldsymbol{w} and boldsymbolvboldsymbol{v} are mutation sequences satisfying

Cboldsymbolw=Cboldsymbolv,C^{boldsymbol{w}}=C^{boldsymbol{v}},

then

pi(riboldsymbolw)=pi(riboldsymbolv),i=1,…,n.pi(r_i^{boldsymbol{w}})=pi(r_i^{boldsymbol{v}}),\qquad i=1,\ldots,n.

In particular, Bboldsymbolw=BboldsymbolvB^{boldsymbol{w}}=B^{boldsymbol{v}}. The conjecture asks whether one ordering makes the represented reflections depend only on the resulting CC-matrix; the paper investigates this problem in the setting of quiver mutations, while its general status is not resolved in the supplied text.

References

Primary source

Tucker J. Ervin, Blake Jackson, Kyu-Hwan Lee and Kyungyong Lee, “Mutations of reflections and existence of pseudo-acyclic orderings for type A_n”, arXiv:2108.03309 (2021).

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