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Discrete Mathematics & Theoretical Computer Science |
Gregg Musiker ; Ralf Schiffler - Cluster algebras of unpunctured surfaces and snake graphs
dmtcs:2685 - Discrete Mathematics & Theoretical Computer Science, January 1, 2009, DMTCS Proceedings vol. AK, 21st International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2009) - https://doi.org/10.46298/dmtcs.2685Cluster algebras of unpunctured surfaces and snake graphsArticle
- 1 Department of Mathematics [MIT]
- 2 Department of Mathematics [Storrs]
We study cluster algebras with principal coefficient systems that are associated to unpunctured surfaces. We give a direct formula for the Laurent polynomial expansion of cluster variables in these cluster algebras in terms of perfect matchings of a certain graph $G_{T,\gamma}$ that is constructed from the surface by recursive glueing of elementary pieces that we call tiles. We also give a second formula for these Laurent polynomial expansions in terms of subgraphs of the graph $G_{T,\gamma}$ .
Source: HAL:hal-01185377v1
Volume: DMTCS Proceedings vol. AK, 21st International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2009)
Section: Proceedings
Published on: January 1, 2009
Imported on: January 31, 2017
Keywords: cluster algebra,triangulated surface,principal coefficients,F-polynomial,height function,snake graphs,[MATH.MATH-CO] Mathematics [math]/Combinatorics [math.CO],[INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM]
Funding:
- Source : OpenAIRE Graph
- Cluster algebras and tilting theory; Funder: National Science Foundation; Code: 0700358
- PostDoctoral Research Fellowship; Funder: National Science Foundation; Code: 0703691
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