The support tau-tilting enumeration conjecture for gentle arbor quivers

Let tt be an arbor, let GtG_t be the associated gentle quiver-with-relations, and let PtP_t be the associated poset. A support-τ\tau-tilting object is an object in the support-τ\tau-tilting theory of the algebra defined by GtG_t.

The support tau-tilting enumeration conjecture. The number of support-τ\tau-tilting objects for the gentle quiver-with-relations GtG_t is equal to the number of elements of PtP_t.

The source explains that the mutation graph of these objects is finite and gives rise to a congruence-uniform lattice and a simple polytope, but presents the enumeration as an unresolved conjectural relationship.

Sources & referencesView supporting material

Primary source

Frédéric Chapoton, “On posets and polytopes attached to arbors”, arXiv:2503.04247 (2025).

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