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Tubular cluster algebras I: categorification

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Abstract

We present a categorification of four mutation finite cluster algebras by the cluster category of the category of coherent sheaves over a weighted projective line of tubular weight type. Each of these cluster algebras which we call tubular is associated to an elliptic root system. We show that via a cluster character the cluster variables are in bijection with the positive real Schur roots associated to the weighted projective line. In one of the four cases this is achieved by the approach to cluster algebras of Fomin–Shapiro–Thurston using a 2-sphere with 4 marked points whereas in the remaining cases it is done by the approach of Geiss–Leclerc–Schröer using preprojective algebras.

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Authors and Affiliations

  1. Instituto de Matemáticas, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico, D.F., Mexico

    Michael Barot & Christof Geiss

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  1. Michael Barot
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  2. Christof Geiss
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Correspondence to Christof Geiss.

Additional information

M. Barot and C. Geiss thankfully acknowledge support from grant PAPIIT IN103507.

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Barot, M., Geiss, C. Tubular cluster algebras I: categorification. Math. Z. 271, 1091–1115 (2012). https://doi.org/10.1007/s00209-011-0905-8

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  • DOI: https://doi.org/10.1007/s00209-011-0905-8

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