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Derived Reid's recipe for abelian subgroups of SL3(C)
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For any finite subgroup G in SL3(C), work of Bridgeland-King-Reid constructs an equivalence between the G-equivariant derived category of C^3 and the derived category of the crepant resolution Y = G-Hilb(C^3) of C^3/G. When G is abelian we show that this equivalence gives a natural correspondence between irreducible representations of G and certain sheaves on exceptional subvarieties of Y, thereby extending the McKay correspondence from two to three dimensions. This categorifies Reid's recipe and extends earlier work from [CL09] and [Log10] which dealt only with the case when C^3/G has one isolated singularity.
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Walls for $G$-Hilb via Reid's Recipe
The walls of the G-Hilb chamber for finite abelian G in SL3(C) are exactly: Type I walls from (-1,-1)-curves, Type III walls from generalised long sides, and Type 0 walls from exceptional divisors, with all inequaliti...
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