Generalized-minor realization of regular cluster variables for Coxeter double Bruhat cells

Let QQ be a finite valued quiver without oriented cycles, and let Gc,c1GG^{c,c^{-1}} \subset G be the associated Coxeter double Bruhat cell. The algebra AQ~dp\mathcal{A}_{\widetilde{Q}_{dp}} is identified with k[Gc,c1]\Bbbk[G^{c,c^{-1}}]. A generalized minor is a matrix coefficient associated with a representation and weights; a cluster variable is regular if it arises from a regular representation. Generalized-minor realization conjecture. All regular cluster variables in AQ~dp\mathcal{A}_{\widetilde{Q}_{dp}} are generalized minors of representations that are neither highest- nor lowest-weight, and the weight of each such minor is the g\mathbf{g}-vector of the cluster variable. This would extend the generalized-minor description beyond preprojective and postinjective cluster variables, whose defining relations come from global generalized determinantal identities, to level zero and regular representations; an interpretation of their exchange relations remains desirable and is not provided here.

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Primary source

Dylan Rupel, Salvatore Stella and Harold Williams, “On Generalized Minors and Quiver Representations”, arXiv:1606.03440 (2017).

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