关键词:
Quantum affine algebras
Quantum Grothendieck rings
Kazhdan-Lusztig algorithm
T-systems
Quantum cluster algebras
Dual canonical bases
摘要:
We establish ring isomorphisms between quantum Grothendieck rings of certain remarkable monoidal categories C-2,C-Bn and C-Q,C-A2n-1 of finite-dimensional representations of quantum affine algebras of types Bn-(1) and A(2n-1)((1)), respectively. Our proof relies in part on the corresponding quantum cluster algebra structures. Moreover, we prove that our isomorphisms specialize at t = 1 to the isomorphisms of (classical) Grothendieck rings obtained recently by Kashiwara, Kim and Oh by other methods. As a consequence, we prove a conjecture formulated by the first author in 2002: the multiplicities of simple modules in standard modules in C-2,C-Bn are given by the specialization of certain analogues of Kazhdan-Lusztig polynomials and the coefficients of these polynomials are positive. (C) 2019 Elsevier Inc. All rights reserved.