Projective functors and the restriction
β
Sergei Khoroshkin
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Article
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1992
π
Springer
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English
β 298 KB
We observe that the restriction of a Verma module over a semi-simple Lie algebra to a subalgebra of Levi type may be viewed as a projective functor. By simple arguments we prove that this restriction can be decomposed into a direct sum of standard indecomposables in the category 0. For the restricti