Complete gentle and special biserial algebras are $g$-tame

Abstract

The $g$-vectors of two-term presilting complexes are important invariants. We study a fan consisting of all $g$-vector cones for a complete gentle algebra. We show that any complete gentle algebra is $g$-tame, by definition, the closure of a geometric realization of its fan is the entire ambient vector space. Our main ingredients are their surface model and their asymptotic behavior under Dehn twists. On the other hand, it is known that any complete special biserial algebra is a factor algebra of a complete gentle algebra and the $g$-tameness is preserved under taking factor algebras. As a consequence, we get the $g$-tameness of complete special biserial algebras.

arXiv comment26 pages

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Cited by in corpus (2)

• $\tau$-tilting finiteness and $\mathbf{g}$-tameness: Incidence algebras of posets and concealed algebras
• Denseness of $g$-vector cones from weighted orbifolds