Lax matrices from antidominantly shifted Yangians and quantum affine algebras: A-type
Lax matrices from antidominantly shifted Yangians and quantum affine algebras: A-type
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来自反显性移位 Yangians 和量子仿射代数的松弛矩阵:A 型
DOI:
10.1016/j.aim.2022.108283
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发表时间:
2020
影响因子:
1.7
通讯作者:
A. Tsymbaliuk
中科院分区:
文献类型:
--
作者:
R. Frassek;V. Pestun;A. Tsymbaliuk
We construct a family of G L n rational and trigonometric Lax matrices T D (z) parametrized by Λ+-valued divisors D on P 1. To this end, we study the shifted Drinfeld Yangians Y μ (gl n) and quantum affine algebras U μ+, μ−(L gl n), which slightly generalize their sl n-counterparts of [3],[18]. Our key observation is that both algebras admit the RTT type realization when μ (resp. μ+ and μ−) are antidominant coweights. We prove that T D (z) are polynomial in z (up to a rational factor) and obtain explicit simple formulas for those linear in z. This generalizes the recent construction by the first two authors of linear rational Lax matrices [15] in both trigonometric and higher z-degree directions. Furthermore, we show that all T D (z) are normalized limits of those parametrized by D supported away from {∞}(in the rational case) or {0,∞}(in the trigonometric case). The RTT approach provides conceptual and elementary proofs for the construction of the coproduct homomorphisms on shifted Yangians and quantum affine algebras of sl n, previously established in [14],[18] via rather tedious computations. Finally, we establish a close relation between a certain collection of explicit linear Lax matrices and the well-known parabolic Gelfand-Tsetlin formulas.
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DOI:
10.1016/j.aim.2017.06.018
发表时间:
2016
期刊:
arXiv: Representation Theory
影响因子:
--
作者:
M. Finkelberg;J. Kamnitzer;Khoa Pham;L. Rybnikov;Alex Weekes
通讯作者:
Alex Weekes
影响因子:
--
作者:
M. Finkelberg;A. Tsymbaliuk
通讯作者:
A. Tsymbaliuk
影响因子:
2.4
作者:
A. Gerasimov;S. Kharchev;D. Lebedev;S. Oblezin
通讯作者:
S. Oblezin
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
A. Gerasimov;S. Kharchev;D. Lebedev;S. Oblezin
通讯作者:
S. Oblezin
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
R. Donagi;D. Gaitsgory
通讯作者:
D. Gaitsgory