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Local Moduli and Singularities
Olav Arnfinn LaudalGerhard Pfister
出版Springer, 2006-11-15
主題Mathematics / Geometry / AlgebraicMathematics / Group TheoryMathematics / TopologyMathematics / Algebra / General
ISBN35403915339783540391531
URLhttp://books.google.com.hk/books?id=LU58CwAAQBAJ&hl=&source=gbs_api
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註釋This research monograph sets out to study the notion of a local moduli suite of algebraic objects like e.g. schemes, singularities or Lie algebras and provides a framework for this. The basic idea is to work with the action of the kernel of the Kodaira-Spencer map, on the base space of a versal family. The main results are the existence, in a general context, of a local moduli suite in the category of algebraic spaces, and the proof that, generically, this moduli suite is the quotient of a canonical filtration of the base space of the versal family by the action of the Kodaira-Spencer kernel. Applied to the special case of quasihomogenous hypersurfaces, these ideas provide the framework for the proof of the existence of a coarse moduli scheme for plane curve singularities with fixed semigroup and minimal Tjurina number . An example shows that for arbitrary the corresponding moduli space is not, in general, a scheme. The book addresses mathematicians working on problems of moduli, in algebraic or in complex analytic geometry. It assumes a working knowledge of deformation theory.