The converse from left-finite semibricks to brick finiteness

Let AA be a finite dimensional KK-algebra. A semibrick is left finite if it satisfies the left-finiteness condition defined in the surrounding theory, and AA is brick finite if it has only finitely many isoclasses of bricks.

Converse conjecture. If every semibrick is left finite, then AA is brick finite.

Brick finiteness implies that every semibrick is left finite, and the converse remains an open problem.

Sources & referencesView supporting material

Primary source

Sota Asai, “Mutations of simple-minded collections revisited”, arXiv:2606.15537 (2026).

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