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Paper   IPM / M / 17372
School of Mathematics
  Title:   Cluster algebras generated by projective cluster variables
  Author(s):  Alireza Nasr-Isfahani (Joint with K. Baur)
  Status:   Published
  Journal: J. Algebra
  Vol.:  627
  Year:  2023
  Pages:   1-42
  Supported by:  IPM
  Abstract:
We introduce the notion of a lower bound cluster algebra generated by projective cluster variables as a polynomial ring over the initial cluster variables and the so-called projective cluster variables. We show that under an acyclicity assumption, the cluster algebra and the lower bound cluster algebra generated by projective cluster variables coincide. In this case we use our results to construct a basis for the cluster algebra. We also show that any coefficient-free cluster algebra of types Anor Anis equal to the corresponding lower bound cluster algebra generated by projective cluster variables.

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