New irreducible weight modules over Witt algebras with infinite‐dimensional weight spaces
New irreducible weight modules over Witt algebras with infinite‐dimensional weight spaces
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DOI:
10.1112/blms/bdv048
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发表时间:
2014-07
影响因子:
0.9
通讯作者:
Genqiang Liu;K. Zhao
中科院分区:
文献类型:
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作者:
Genqiang Liu;K. Zhao
Let d>1 be an integer. In 1986, Shen defined a class of weight modules Fbα(V) over the Witt algebra Wd for α∈Cd , b∈C , and an irreducible module V over the general linear Lie algebra gld on which the identity matrix acts as multiplication by b . In 1996, Eswara Rao determined necessary and sufficient conditions for these modules to be irreducible when V is finite‐dimensional. In this note, we will determine necessary and sufficient conditions for all these modules Fbα(V) to be irreducible where V is not necessarily finite‐dimensional. In this way, we obtain a large new family of irreducible Wd ‐modules with infinite‐dimensional weight spaces.