Crystal base elements of an extremal weight module fixed by a diagram automorphism II
Crystal base elements of an extremal weight module fixed by a diagram automorphism II
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由图自同构 II 固定的极值重量模块的晶体基元
DOI:
10.1007/978-0-8176-4697-4_9
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
S. Naito and D. Sagaki
中科院分区:
文献类型:
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作者:
Konishi E;Pang SM;Yahiro M;Young RU;et al;S. Naito and D. Sagaki
We continue the study of the fixed point subset of a crystal under the action of a Dynkin diagram automorphism, by restricting ourselves to the case of the crystal base of an extremal weight module over a quantum affine algebra. In previous works, we introduced and studied a canonical injection from the fixed point subset of the crystal base above into the crystal base of a certain extremal weight module for the associated orbit Lie algebra, in the setting of general Kac–Moody algebras. The purpose of this chapter is to prove that this (injective) map is also surjective, and hence bijective under the assumption that the Dynkin diagram automorphism fixes a distinguished vertex “0” of the (affine) Dynkin diagram.