作者: Vadim Schechtman , Mikhail Kapranov
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摘要: For a complex reductive Lie group G with algebra g, Cartan subalgebra h and Weyl W, we describe the category of perverse sheaves on h/W smooth w.r.t natural stratification. The answer is given in terms mixed Bruhat sheaves, which are certain sheaf-cosheaf data cells cell decomposition h/W. Using parabolic decomposition, relate properties various procedures induction restriction that connect different Levi subgroups G.