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| Format: | Preprint |
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2023
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| Online Access: | https://arxiv.org/abs/2308.00792 |
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| _version_ | 1866915497611624448 |
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| author | Geiß, Christof Labardini-Fragoso, Daniel Wilson, Jon |
| author_facet | Geiß, Christof Labardini-Fragoso, Daniel Wilson, Jon |
| contents | Let $\boldsymbolΣ:=(Σ,\mathbb{M},\mathbb{P})$ be a surface with marked points $\mathbb{M}\subset\partialΣ\neq\varnothing$ on the boundary, and punctures $\mathbb{P}\subsetΣ\setminus\partialΣ$, and $T$ an arbitrary tagged triangulation of $\boldsymbolΣ$ in the sense of Fomin-Shapiro-Thurston. The Jacobian algebra $A(T):=\mathcal{P}(Q(T), W(T))$ corresponding to the non-degenerate potential $W(T)$ defined by Cerulli Irelli and the second author is tame, as shown by Schröer and the first two authors. In this paper, we show that there is a natural isomorphism $π_T:\operatorname{Lam}(\boldsymbolΣ)\rightarrow\operatorname{DecIrr}^τ(A(T))$ of tame partial KRS-monoids that intertwines dual shear coordinates with respect to $T$, and generic $g$-vectors of irreducible components. Here, $\operatorname{Lam}(\boldsymbolΣ)$ is the set of laminations of $\boldsymbolΣ$ considered by Musiker-Schiffler-Williams, with the disjoint union of non-intersecting laminations as partial monoid operation. On the other hand, $\operatorname{DecIrr}^τ(A(T))$ denotes the set of generically $τ$-regular irreducible components of the decorated representation varieties of $A(T)$, with the direct sum of generically $E$-orthogonal irreducible components as partial monoid operation, where $E$ is the symmetrized $E$-invariant of Derksen-Weyman-Zelevinsky, $E(-,\bullet)=\dim\operatorname{Hom}_{A(T)}(-,τ(\bullet))+\dim\operatorname{Hom}_{A(T)}(\bullet,τ(-))$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_00792 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Laminations of punctured surfaces as $τ$-regular irreducible components Geiß, Christof Labardini-Fragoso, Daniel Wilson, Jon Representation Theory 16G20, 13F60, 57K20 Let $\boldsymbolΣ:=(Σ,\mathbb{M},\mathbb{P})$ be a surface with marked points $\mathbb{M}\subset\partialΣ\neq\varnothing$ on the boundary, and punctures $\mathbb{P}\subsetΣ\setminus\partialΣ$, and $T$ an arbitrary tagged triangulation of $\boldsymbolΣ$ in the sense of Fomin-Shapiro-Thurston. The Jacobian algebra $A(T):=\mathcal{P}(Q(T), W(T))$ corresponding to the non-degenerate potential $W(T)$ defined by Cerulli Irelli and the second author is tame, as shown by Schröer and the first two authors. In this paper, we show that there is a natural isomorphism $π_T:\operatorname{Lam}(\boldsymbolΣ)\rightarrow\operatorname{DecIrr}^τ(A(T))$ of tame partial KRS-monoids that intertwines dual shear coordinates with respect to $T$, and generic $g$-vectors of irreducible components. Here, $\operatorname{Lam}(\boldsymbolΣ)$ is the set of laminations of $\boldsymbolΣ$ considered by Musiker-Schiffler-Williams, with the disjoint union of non-intersecting laminations as partial monoid operation. On the other hand, $\operatorname{DecIrr}^τ(A(T))$ denotes the set of generically $τ$-regular irreducible components of the decorated representation varieties of $A(T)$, with the direct sum of generically $E$-orthogonal irreducible components as partial monoid operation, where $E$ is the symmetrized $E$-invariant of Derksen-Weyman-Zelevinsky, $E(-,\bullet)=\dim\operatorname{Hom}_{A(T)}(-,τ(\bullet))+\dim\operatorname{Hom}_{A(T)}(\bullet,τ(-))$. |
| title | Laminations of punctured surfaces as $τ$-regular irreducible components |
| topic | Representation Theory 16G20, 13F60, 57K20 |
| url | https://arxiv.org/abs/2308.00792 |