English

Bases for upper cluster algebras and tropical points

Representation Theory 2021-07-08 v4 Rings and Algebras

Abstract

It is known that many (upper) cluster algebras possess different kinds of good bases which contain the cluster monomials and are parametrized by the tropical points of cluster Poisson varieties. For a large class of upper cluster algebras (injective-reachable ones with full rank coefficients), we describe all of its bases with these properties. Moreover, we show the existence of the generic basis for them. In addition, we prove that Bridgeland's representation theoretic formula is effective for their theta functions (weak genteelness). Our results apply to (almost) all well-known cluster algebras arising from representation theory or higher Teichm\"uller theory, including quantum affine algebras, unipotent cells, double Bruhat cells, skein algebras over surfaces, where we change the coefficients if necessary so that the full rank assumption holds.

Keywords

Cite

@article{arxiv.1902.09507,
  title  = {Bases for upper cluster algebras and tropical points},
  author = {Fan Qin},
  journal= {arXiv preprint arXiv:1902.09507},
  year   = {2021}
}

Comments

68 pages; add Remark 1.2.6, 1.2.7, Example 3.4.3; add details for treating the quantum case

R2 v1 2026-06-23T07:50:35.763Z