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Resolution of quotient singularities via $G$-constellations

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For a finite subgroup $G$ of $\GL_n(\C)$, the moduli space $\mth$ of $\theta$-stable $G$-constellations is rarely smooth. This note shows that for a group $G$ of type $\frac{1}{r}(1,a,b)$ with $r=abc+a+b$, there is a generic stability parameter $\theta\in \Theta$ such that the birational component $\yth$ of $\theta$-stable $G$-constellations provides a resolution of the quotient singularity $X:=\C^3/G$.

Abstract

For a finite subgroup $G$ of $\GL_n(\C)$, the moduli space $\mth$ of $\theta$-stable $G$-constellations is rarely smooth. This note shows that for a group $G$ of type $\frac{1}{r}(1,a,b)$ with $r=abc+a+b$, there is a generic stability parameter $\theta\in \Theta$ such that the birational component $\yth$ of $\theta$-stable $G$-constellations provides a resolution of the quotient singularity $X:=\C^3/G$.

참고문헌 (9)

  1. T. Bridgeland, "The McKay correspondence as an equivalence of derived categories", J. Amer. Math. Soc, 14(3), pp.535~554 (2001)[DOI]
  2. A. Craw, "Flops of G-Hilb and equivalences of derived categories by variation of GIT quotient", Duke Math. J, 124(2), pp.259~307 (2004)[DOI]
  3. A. Craw, "Moduli of McKay quiver representations. I. The coherent component", Proc. Lond. Math. Soc, 95(1), pp.179~198 (2007)[DOI]
  4. S. -J. Jung, "Terminal quotient singularities in dimension three via variation of GIT", J. Algebra, 468, pp.354~394 (2016)[DOI]
  5. S. -J. Jung, "On the Craw-Ishii conjecture", J. Pure Appl. Algebra, 222(7), pp.1579~1605 (2018)[DOI]
  6. A. D. King, "Moduli of representations of finite-dimensional algebras", Quart. J. Math. Oxford Ser, 45(180), pp.515~530 (1994)[DOI]
  7. I. Nakamura, "Hilbert schemes of abelian group orbits", J. Algebraic Geom, 10(4), pp.757~779 (2001)
  8. M. Reid, "Young person’s guide to canonical singularities, in Algebraic geometry, Bowdoin", Proc. Sympos. Pure Math., pp.345~414 (1987)

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