Moduli of McKay quiver representations I: the coherent component

Alastair Craw, Diane Maclagan, Rekha R. Thomas

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For a finite abelian group G in GL(n,k), we describe the coherent component Y_theta of the moduli space M_theta of theta-stable McKay quiver representations. This is a not-necessarily-normal toric variety that admits a projective birational morphism to A^n/G obtained by variation of GIT quotient. As a special case, this gives a new construction of Nakamura's G-Hilbert scheme that avoids the (typically highly singular) Hilbert scheme of |G|-points in A^n. To conclude, we describe the toric fan of Y_theta and hence calculate the quiver representation corresponding to any point of Y_theta.
Original languageUndefined/Unknown
Pages (from-to)179-198
JournalProceedings of the London Mathematical Society
Issue number1
Publication statusPublished - 2007

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