Criteria of Contractability and Rational Singularities

  • Lucian Bădescu
Part of the Universitext book series (UTX)


In what follows, surface will mean nonsingular projective surface. If other types of surfaces are to be considered, we will specify that explicitly; for example, we will say normal surfaces, affine surfaces, etc.


Exact Sequence Local Ring Rational Singularity Dynkin Diagram Global Section 
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Bibliographic References

  1. The main references for this chapter are [Artl, Art2].Google Scholar
  2. The method of proof of (3.12), (3.13), and (3.14) belongs to the author.Google Scholar
  3. Some of the proofs (for example, those of (3.23), (3.24), and (3.25)) were inspired by [Lip].Google Scholar

Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • Lucian Bădescu
    • 1
  1. 1.Institute of MathematicsRomanian AcademyBucharestRomania

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