Poisson Algebras of Block-Upper-Triangular Bilinear Forms and Braid Group Action
Poisson Algebras of Block-Upper-Triangular Bilinear Forms and Braid Group Action
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块上三角双线性形式的泊松代数和辫群作用
DOI:
10.1007/s00220-013-1757-3
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发表时间:
2013
影响因子:
2.4
通讯作者:
Chekhov L
中科院分区:
文献类型:
--
作者:
Chekhov L
In this paper we study a quadratic Poisson algebra structure on the space of bilinear forms onwith the property that for anysuch thatnm=N, the restriction of the Poisson algebra to the space of bilinear forms with a block-upper-triangular matrix composed from blocks of sizeis Poisson. We classify all central elements and characterise the Lie algebroid structure compatible with the Poisson algebra. We integrate this algebroid obtaining the corresponding groupoid of morphisms of block-upper-triangular bilinear forms. The groupoid elements automatically preserve the Poisson algebra. We then obtain the braid group action on the Poisson algebra as elementary generators within the groupoid. We discuss the affinisation and quantisation of this Poisson algebra, showing that in the casem= 1 the quantum affine algebra is the twistedq-Yangian forand form= 2 is the twistedq-Yangian for. We describe the quantum braid group action in these two examples and conjecture the form of this action for anym> 2. Finally, we give anR-matrix interpretation of our results and discuss the relation with Poisson–Lie groups.
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