Quasitriangular coideal subalgebras of Uq(g) in terms of generalized Satake diagrams
Quasitriangular coideal subalgebras of Uq(g) in terms of generalized Satake diagrams
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Uq(g) 广义佐竹图的拟三角共理想子代数
DOI:
10.1112/blms.12360
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发表时间:
2018
影响因子:
0.9
通讯作者:
Bart Vlaar
中科院分区:
文献类型:
--
作者:
V. Regelskis;Bart Vlaar
Let g be a finite‐dimensional semisimple complex Lie algebra and θ an involutive automorphism of g . According to Letzter, Kolb and Balagović the fixed‐point subalgebra k=gθ has a quantum counterpart B , a coideal subalgebra of the Drinfeld–Jimbo quantum group Uq(g) possessing a universal K ‐matrix K . The objects θ , k , B and K can all be described in terms of Satake diagrams. In the present work, we extend this construction to generalized Satake diagrams, combinatorial data first considered by Heck. A generalized Satake diagram naturally defines a semisimple automorphism θ of g restricting to the standard Cartan subalgebra h as an involution. It also defines a subalgebra k⊂g satisfying k∩h=hθ , but not necessarily a fixed‐point subalgebra. The subalgebra k can be quantized to a coideal subalgebra of Uq(g) endowed with a universal K ‐matrix in the sense of Kolb and Balagović. We conjecture that all such coideal subalgebras of Uq(g) arise from generalized Satake diagrams in this way.
DOI:
10.1515/crelle-2016-0012
发表时间:
2015-07
期刊:
Journal für die reine und angewandte Mathematik (Crelles Journal)
影响因子:
--
作者:
M. Balagovic;S. Kolb
通讯作者:
M. Balagovic;S. Kolb
DOI:
10.1090/ert/469
发表时间:
2015
期刊:
Representation Theory of the American Mathematical Society
影响因子:
--
作者:
Balagovic M
通讯作者:
Balagovic M