Tensor products, characters, and blocks of finite-dimensional representations of quantum affine algebras at roots of unity
Tensor products, characters, and blocks of finite-dimensional representations of quantum affine algebras at roots of unity
复制标题
单位根处量子仿射代数的有限维表示的张量积、特征和块
DOI:
10.1093/imrn/rnq250
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
A. Moura
中科院分区:
文献类型:
--
作者:
D. Jakelić;A. Moura
We establish several results concerning tensor products, q-characters, and the block decomposition of the category of finite-dimensional representations of quantum affine algebras in the root of unity setting. In the generic case, a Weyl module is isomorphic to a tensor product of fundamental representations and this isomorphism was essential for establishing the block decomposition theorem. This is no longer true in the root of unity setting. We overcome the lack of such a tool by utilizing results on specialization of modules. Furthermore, we establish a sufficient condition for a Weyl module to be a tensor product of fundamental representations and prove that this condition is also necessary when the underlying simple Lie algebra is sl(2). We also study the braid group invariance of q-characters of fundamental representations.
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
T. Kobayashi;T. Oshima
通讯作者:
T. Oshima
DOI:
--
发表时间:
2007
期刊:
J. Algebr. Comb. 26
影响因子:
--
作者:
Wakako Nakai;Tomoki Nakanishi
通讯作者:
Tomoki Nakanishi
DOI:
10.1090/s0894-0347-1989-0991016-9
发表时间:
1989-09
影响因子:
3.9
作者:
G. Lusztig
通讯作者:
G. Lusztig