The c4-tilting finiteness conjecture for symmetric algebras

Let AA be a finite-dimensional symmetric algebra. The algebra AA is τ\tau-tilting finite if it has only finitely many isomorphism classes of support τ\tau-tilting modules, and it is tilting-discrete if it has only finitely many tilting complexes of each length. The τ\tau-tilting finiteness conjecture. Any τ\tau-tilting finite symmetric algebra is tilting-discrete.

This conjecture concerns the relationship between finiteness of support τ\tau-tilting modules and finiteness of tilting complexes for symmetric algebras. The paper states that it is false and provides a counterexample.

Sources & referencesView supporting material

Primary source

Takuma Aihara, “Examples of tilting-discrete symmetric algebras”, arXiv:2511.06695 (2025).

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