Echelonmotion and the Auslander–Reiten permutation for Auslander-regular posets

Let RR be a finite poset whose incidence algebra over a field of characteristic 00 is Auslander-regular, and suppose that RR is connected. A finite poset is echelon-independent when the echelon operator is independent of the choice of linear extension, and echelonmotion is the resulting operator on RR. The Auslander–regular poset conjecture. RR is echelon-independent, and echelonmotion on RR is the inverse of the Auslander–Reiten permutation of RR. The classification of Auslander-regular posets is open, with partial progress known; this conjecture would connect echelonmotion with homological algebra beyond the distributive-lattice case.

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Primary source

Colin Defant, Yuhan Jiang, Rene Marczinzik, Adrien Segovia, David E Speyer, Hugh Thomas and Nathan Williams, “Rowmotion and Echelonmotion”, arXiv:2507.18230 (2025).

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