Vol. 10, No. 9, 2016

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ISSN: 1944-7833 (e-only)
ISSN: 1937-0652 (print)
Cluster algebras and category $\mathscr{O}$ for representations of Borel subalgebras of quantum affine algebras

David Hernandez and Bernard Leclerc

Vol. 10 (2016), No. 9, 2015–2052
DOI: 10.2140/ant.2016.10.2015

Let O be the category of representations of the Borel subalgebra of a quantum affine algebra introduced by Jimbo and the first author. We show that the Grothendieck ring of a certain monoidal subcategory of O has the structure of a cluster algebra of infinite rank, with an initial seed consisting of prefundamental representations. In particular, the celebrated Baxter relations for the 6-vertex model get interpreted as Fomin–Zelevinsky mutation relations.

quantum affine algebras, cluster algebras, category $\mathscr{O}$, monoidal categorification, Baxter relations\lower5pt\hbox
Mathematical Subject Classification 2010
Primary: 17B37
Secondary: 13F60, 17B10, 82B23
Received: 19 April 2016
Accepted: 9 August 2016
Published: 22 November 2016
David Hernandez
Institut de Mathématiques de Jussieu-Paris Rive Gauche
Université Paris-Diderot Paris 7
Bâtiment Sophie Germain, Case 7012
75205 Paris Cedex 13
Bernard Leclerc
Laboratoire de Mathématiques Nicolas Oresme
Université de Caen Basse-Normandie
14032 Caen